Holtek BS82B12A-3 User manual

Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Revision: V1.20 Date: January 23, 2015January 23, 2015

Rev. 1.20 2 January 23, 2015 Rev. 1.20 3 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Table of Contents
Features............................................................................................................ 6
CPU Features ......................................................................................................................... 6
Peripheral Features................................................................................................................. 6
General Description ........................................................................................ 7
Selection Table................................................................................................. 7
Block Diagram.................................................................................................. 8
Pin Assignment................................................................................................ 8
Pin Descriptions ............................................................................................ 10
Absolute Maximum Ratings.......................................................................... 17
D.C. Characteristics....................................................................................... 18
A.C. Characteristics....................................................................................... 20
Sensor Oscillator Electrical Characteristics ............................................... 21
Power-on Reset Characteristics .................................................................. 24
System Architecture...................................................................................... 25
Clocking and Pipelining......................................................................................................... 25
Program Counter................................................................................................................... 26
Stack ..................................................................................................................................... 27
Arithmetic and Logic Unit – ALU ........................................................................................... 27
Flash Program Memory................................................................................. 28
Structure................................................................................................................................ 28
Special Vectors ..................................................................................................................... 29
Look-up Table........................................................................................................................ 29
Table Program Example........................................................................................................ 29
In Circuit Programming – ICP ............................................................................................... 30
On-Chip Debug Support – OCDS ......................................................................................... 31
RAM Data Memory ......................................................................................... 32
Structure................................................................................................................................ 32
Special Function Register Description........................................................ 36
Indirect Addressing Registers – IAR0, IAR1 ......................................................................... 36
Memory Pointers – MP0, MP1 .............................................................................................. 36
Bank Pointer – BP................................................................................................................. 37
Accumulator – ACC............................................................................................................... 38
Program Counter Low Register – PCL.................................................................................. 38
Look-up Table Registers – TBLP, TBHP, TBLH..................................................................... 38
Status Register – STATUS.................................................................................................... 39
EEPROM Data Memory.................................................................................. 41
EEPROM Data Memory Structure ........................................................................................ 41
EEPROM Registers .............................................................................................................. 41
Reading Data from the EEPROM ........................................................................................ 43

Rev. 1.20 2 January 23, 2015 Rev. 1.20 3 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Writing Data to the EEPROM................................................................................................ 43
Write Protection..................................................................................................................... 43
EEPROM Interrupt ................................................................................................................ 43
Programming Considerations................................................................................................ 44
Oscillator ........................................................................................................ 45
Oscillator Overview ............................................................................................................... 45
System Clock Congurations................................................................................................ 45
Internal RC Oscillator – HIRC ............................................................................................... 46
Internal 32kHz Oscillator – LIRC........................................................................................... 46
External 32.768kHz Crystal Oscillator – LXT ........................................................................ 47
LXT Oscillator Low Power Function ..................................................................................... 48
Operating Modes and System Clocks ......................................................... 48
System Clocks ...................................................................................................................... 48
System Operation Modes...................................................................................................... 50
Control Register .................................................................................................................... 51
Operating Mode Switching ................................................................................................... 53
NORMAL Mode to SLOW Mode Switching ........................................................................... 53
SLOW Mode to NORMAL Mode Switching .......................................................................... 54
Entering the SLEEP Mode .................................................................................................... 54
Entering the IDLE0 Mode...................................................................................................... 55
Entering the IDLE1 Mode...................................................................................................... 55
Standby Current Considerations ........................................................................................... 55
Wake-up................................................................................................................................ 56
Programming Considerations................................................................................................ 56
Watchdog Timer............................................................................................. 57
Watchdog Timer Clock Source.............................................................................................. 57
Watchdog Timer Control Register ......................................................................................... 57
Watchdog Timer Operation ................................................................................................... 58
Reset and Initialisation.................................................................................. 59
Reset Functions .................................................................................................................... 59
Reset Initial Conditions ......................................................................................................... 61
Input/Output Ports ......................................................................................... 65
I/O Register List .................................................................................................................... 65
Pull-high Resistors ................................................................................................................ 66
Port A Wake-up ..................................................................................................................... 66
I/O Port Control Registers ..................................................................................................... 66
I/O Pin Structures.................................................................................................................. 66
Source Current Selection ...................................................................................................... 67
Programming Considerations................................................................................................ 68
Timer Modules – TM ...................................................................................... 69
Introduction ........................................................................................................................... 69
TM Operation ........................................................................................................................ 69
TM Clock Source................................................................................................................... 69
TM Interrupts......................................................................................................................... 70

Rev. 1.20 4 January 23, 2015 Rev. 1.20 5 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
TM External Pins................................................................................................................... 70
TM Input/Output Pin Control Register ................................................................................... 70
Programming Considerations................................................................................................ 73
Compact Type TM – CTM0 ............................................................................ 74
Compact TM Operation......................................................................................................... 74
Compact Type TM Register Description................................................................................ 75
Compact Type TM Operating Modes .................................................................................... 79
Compare Match Output Mode............................................................................................... 79
Timer/Counter Mode ............................................................................................................. 82
PWM Output Mode................................................................................................................ 82
Periodic Type TM – PTM0.............................................................................. 85
Periodic TM Operation .......................................................................................................... 85
Periodic Type TM Register Description................................................................................. 86
Periodic Type TM Operating Modes...................................................................................... 90
Compare Match Output Mode............................................................................................... 90
Timer/Counter Mode ............................................................................................................. 93
PWM Output Mode................................................................................................................ 93
Single Pulse Mode ................................................................................................................ 95
Capture Input Mode .............................................................................................................. 97
Touch Key Function ...................................................................................... 99
Touch Key Structure.............................................................................................................. 99
Touch Key Register Denition............................................................................................... 99
Touch Key Operation........................................................................................................... 104
Touch Key Interrupt ............................................................................................................. 107
Programming Considerations.............................................................................................. 107
I2C Interface ................................................................................................. 108
I2C Interface Operation ....................................................................................................... 108
I2C Registers ....................................................................................................................... 109
I2C Bus Communication ......................................................................................................112
I2C Bus Start Signal .............................................................................................................113
Slave Address .....................................................................................................................113
I2C Bus Read/Write Signal ..................................................................................................114
I2C Bus Slave Address Acknowledge Signal .......................................................................114
I2C Bus Data and Acknowledge Signal ...............................................................................114
I2C Time-out Control.............................................................................................................116
UART Interface .............................................................................................117
UART External Pin Interfacing .............................................................................................117
UART Data Transfer Scheme...............................................................................................118
UART Status and Control Registers.....................................................................................118
Baud Rate Generator .......................................................................................................... 124
Calculating the Baud Rate and Error Values....................................................................... 125
UART Setup and Control..................................................................................................... 125
UART Transmitter................................................................................................................ 127
UART Receiver ................................................................................................................... 128

Rev. 1.20 4 January 23, 2015 Rev. 1.20 5 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Managing Receiver Errors .................................................................................................. 129
UART Module Interrupt Structure........................................................................................ 130
Address Detect Mode.......................................................................................................... 131
UART Power Down and Wake-up....................................................................................... 132
Interrupts ...................................................................................................... 133
Interrupt Registers............................................................................................................... 133
Interrupt Operation .............................................................................................................. 136
External Interrupt................................................................................................................. 137
Time Base Interrupts........................................................................................................... 138
TM Interrupts....................................................................................................................... 139
EEPROM Interrupt .............................................................................................................. 139
LVD Interrupt ....................................................................................................................... 140
Touch Key Interrupt ............................................................................................................. 140
I2C Interrupt ......................................................................................................................... 140
UART Interrupt ................................................................................................................... 140
Interrupt Wake-up Function................................................................................................. 141
Programming Considerations.............................................................................................. 141
SCOM and SSEG Function for LCD ........................................................... 142
LCD Operation .................................................................................................................... 142
LCD Bias Control ................................................................................................................ 144
Low Voltage Detector – LVD ....................................................................... 146
LVD Register ....................................................................................................................... 146
LVD Operation..................................................................................................................... 147
Conguration Options................................................................................. 148
Application Circuit....................................................................................... 149
Instruction Set.............................................................................................. 150
Introduction ......................................................................................................................... 150
Instruction Timing ................................................................................................................ 150
Moving and Transferring Data............................................................................................. 150
Arithmetic Operations.......................................................................................................... 150
Logical and Rotate Operation ............................................................................................. 151
Branches and Control Transfer ........................................................................................... 151
Bit Operations ..................................................................................................................... 151
Table Read Operations ....................................................................................................... 151
Other Operations................................................................................................................. 151
Instruction Set Summary ............................................................................ 152
Table Conventions............................................................................................................... 152
Instruction Denition................................................................................... 154
Package Information ................................................................................... 163
20-pin SOP (300mil) Outline Dimensions ........................................................................... 164
24-pin SOP(300mil) Outline Dimensions ............................................................................ 165
28-pin SOP (300mil) Outline Dimensions ........................................................................... 166
28-pin SSOP (150mil) Outline Dimensions ......................................................................... 167

Rev. 1.20 6 January 23, 2015 Rev. 1.20 7 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Features
CPU Features
• Operatingvoltage

♦fSYS=8MHz:VLVR~5.5V

♦fSYS=12MHz:2.7V~5.5V

♦fSYS=16MHz:4.5V~5.5V
• Upto0.25μsinstructioncyclewith16MHzsystemclockatVDD=5V
• Powerdownandwake-upfunctionstoreducepowerconsumption
• ThreeOscillators

♦HighSpeedInternalRC--HIRC:8/12/16MHz

♦LowSpeedInternalRC--LIRC:32kHz

♦LowspeedExternalCrystal--LXT:32768Hz(onlyforBS82C16A-3andBS82D20A-3)
• Multi-modeoperation:NORMAL,SLOW,IDLEandSLEEP
• Allinstructionsexecutedinoneortwoinstructioncycles
• Tablereadinstructions
• 63powerfulinstructions
• Upto8-levelsubroutinenesting
• Bitmanipulationinstruction
Peripheral Features
• FlashProgramMemory:2K×16~8K×16
• RAMDataMemory:384×8~768×8
• EEPROMMemory:64×8
• Fullyintegrated12/16/20touchkeyfunctions--requirenoexternalcomponents
• WatchdogTimerfunction
• Upto26bidirectionalI/Olines
• PMOSSourceCurrentAdjustable
• Softwarecontrolled4-SCOMlinesLCDdriverwith1/3bias
• OneexternalinterruptlinesharedwithI/Opin
• MultipleTimerModulefortimemeasure,inputcapture,comparematchoutput,PWMoutputor
singlepulseoutputfunction
• DualTime-Basefunctionsforgenerationofxedtimeinterruptsignals
• I2CInterfaceModule
• UARTInterface
• Lowvoltageresetfunction
• Lowvoltagedetectfunction
• Package:20/24/28-pinSOP,28-pinSSOP

Rev. 1.20 6 January 23, 2015 Rev. 1.20 7 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
General Description
ThesedevicesareaseriesofFlashMemorytype8-bithighperformanceRISCarchitecture
microcontrollerswithfullyintegratedtouchkeyfunctions.Withalltouchkeyfunctionsprovided
internallyandwiththeconvenienceofFlashMemorymulti-programmingfeatures,thesedevices
hasallthefeaturestoofferdesignersareliableandeasymeansofimplementingTouchKeyeswithin
theirproductsapplications.
Thetouchkeyfunctionsarefullyintegratedcompletelyeliminatingtheneedforexternal
components.Inadditiontotheflashprogrammemory,othermemoryincludesanareaofRAM
DataMemoryaswellasanareaofEEPROMmemoryforstorageofnon-volatiledatasuchas
serialnumbers,calibrationdataetc.ProtectivefeaturessuchasaninternalWatchdogTimer,Low
VoltageResetandLowVoltageDetectorfunctionscoupledwithexcellentnoiseimmunityandESD
protectionensurethatreliableoperationismaintainedinhostileelectricalenvironments.
AfullchoiceofHIRC,LIRCandLXToscillatorsareprovidedincludingafullyintefratedsystem
oscillatorwhichrequirenoexternalcomponentsfortheirimplementation.Theabilitytooperate
andswitchdynamicallybetweenarangeofoperatingmodesusingdifferentclocksourcesgives
userstheabilitytooptimisemicrocontrolleroperationandminimisepowerconsumption.Easy
communicationwiththeoutsideworldisprovidedusingthefullyintegratedI2Cinterfacefunctions,
whiletheinclusionofexibleI/Oprogrammingfeatures,TimerModulesandmanyotherfeatures
furtherenhancedevicefunctionalityandexibility.
TheUARTmoduleiscontainedinthesedevices.Itcansupporttheapplicationssuchasdata
communicationnetworksbetweenmicrocontrollers,low-costdatalinksbetweenPCsandperipheral
devices,portableandbatteryoperateddevicecommunication,etc.
ThesetouchkeydeviceswillfindexcellentuseinahugerangeofmodernTouchKeyproduct
applicationssuchasinstrumentation,householdappliances,electronicallycontrolledtoolstoname
butafew.
Selection Table
Mostfeaturesarecommontothesedevices,themainfeaturesdistinguishingthemareMemory
capacity,I/Ocount,LCDsegmentcount,TouchKeycount,stackcapacityandpackagetypes.The
followingtablesummarisesthemainfeaturesofeachdevice.
Part No. VDD
Program
Memory
Data
Memory
Data
EEPROM I/O Ext. Int.
LCD
Driver
Timer
Module
Touch
Key I2C UART Time Base Stack Package
BS82B12A-3 2.7V~
5.5V 2K×16 384×8 64×8 22 1 16×4
10-bit
CTM×1
10-bit
PTM×1
12 √ √ 2 6 20/24SOP
BS82C16A-3 2.7V~
5.5V 4K×16 512×8 64×8 26 1 20×4
10-bit
CTM×1
10-bit
PTM×1
16 √ √ 2 6 24/28SOP
BS82D20A-3 2.7V~
5.5V 8K×16 768×8 64×8 26 1 20×4
10-bit
CTM×1
10-bit
PTM×1
20 √ √ 2 8 24/28SOP
28SSOP

Rev. 1.20 8 January 23, 2015 Rev. 1.20 9 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Block Diagram
8-bit
RISC
MCU
Core
Timer
Modules
Flash
Program
Memory
EEPROM
Data
Memory
Flash/EEPROM
Programming Circuitry
(ICP/OCDS)
RAM
Data
Memory
Time
Bases
Low
Voltage
Detect
Watchdog
Timer
Interrupt
Controller
Reset
Circuit
LXT
Oscillator
LED Driver
LCD Driver
Touch Keys
HIRC/LIRC
Oscillators
Low
Voltage
Reset
UARTI
2
CI/O
Note:TheLXToscillatorisonlyfortheBS82C16A-3andBS82D20A-3.
Pin Assignment
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0
PA4/INT/TCK0/SCOM1
PC5/TP0_0/SSEG13
PC4/TP1_0/SSEG12
BS82B12A-3/BS82BV12A-3
20 SOP-A
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
PC3/SSEG11/KEY12
PC2/SSEG10/KEY11
PC1/SSEG9/KEY10
PC0/SSEG8/KEY9
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY1
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
BS82B12A-3/BS82BV12A-3
24 SOP-A
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0
PA4/INT/TCK0/SCOM1
PC7/TP0_1/SSEG15
PC6/TP1_1/SSEG14
PC5/TP0_0/SSEG13
PC4/TP1_0/SSEG12PC3/SSEG11/KEY12
PC2/SSEG10/KEY11
PC1/SSEG9/KEY10
PC0/SSEG8/KEY9
PB7/SSEG7/KEY8
PB6/SSEG6/KEY7
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY124
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12

Rev. 1.20 8 January 23, 2015 Rev. 1.20 9 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
BS82C16A-3/BS82CV16A-3
24 SOP-A
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0
PA4/INT/TCK0/SCOM1
PC7/TP0_1/SSEG15/KEY16
PC6/TP1_1/SSEG14/KEY15
PC5/SSEG13/KEY14
PC4/SSEG12/KEY13
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
PC3/SSEG11/KEY12
PC2/SSEG10/KEY11
PC1/SSEG9/KEY10
PC0/SSEG8/KEY9
PB7/SSEG7/KEY8
PB6/SSEG6/KEY7
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY1
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
BS82C16A-3/BS82CV16A-3
28 SOP-A
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0
PA4/INT/TCK0/SCOM1
PC7/TP0_1/SSEG15/KEY16
PC6/TP1_1/SSEG14/KEY15
PC5/SSEG13/KEY14
PC4/SSEG12/KEY13
PD1/TP0_0/SSEG17/XT2
PD0/TP1_0/SSEG16/XT1
PC3/SSEG11/KEY12
PC2/SSEG10/KEY11
PC1/SSEG9/KEY10
PC0/SSEG8/KEY9
PB7/SSEG7/KEY8
PB6/SSEG6/KEY7
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY1
PD2/SSEG18
PD3/SSEG19
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
BS82D20A-3/BS82DV20A-3
24 SOP-A
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0/KEY20
PA4/INT/TCK0/SCOM1/KEY19
PC7/TP0_1/SSEG15/KEY18
PC6/TP1_1/SSEG14/KEY17
PC5/SSEG13/KEY16
PC4/SSEG12/KEY15PC3/SSEG11/KEY14
PC2/SSEG10/KEY13
PC1/SSEG9/KEY12
PC0/SSEG8/KEY11
PB7/SSEG7/KEY8
PB6/SSEG6/KEY7
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY1

Rev. 1.20 10 January 23, 2015 Rev. 1.20 11 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
PA3/SDA/RX
PA0/TCK1/SCOM2/ICPDA/OCDSDA
BS82D20A-3/BS82DV20A-3
28 SOP-A/SSOP-A
PA2/SCOM3/ICPCK/OCDSCK
PA7/SCL/TX
VDD
VSS
PA1/SCOM0/KEY20
PA4/INT/TCK0/SCOM1/KEY19
PC7/TP0_1/SSEG15/KEY18
PC6/TP1_1/SSEG14/KEY17
PC5/SSEG13/KEY16
PC4/SSEG12/KEY15
PC3/SSEG11/KEY14
PC2/SSEG10/KEY13
PC1/SSEG9/KEY12
PC0/SSEG8/KEY11
PB7/SSEG7/KEY8
PB6/SSEG6/KEY7
PB5/SSEG5/KEY6
PB4/SSEG4/KEY5
PB3/SSEG3/KEY4
PB2/SSEG2/KEY3
PB1/SSEG1/KEY2
PB0/SSEG0/KEY1
PD1/TP0_0/SSEG17/XT2
PD0/TP1_0/SSEG16/XT1
PD2/SSEG18/KEY10
PD3/SSEG19/KEY9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Note:1.Ifthepin-sharedpinfunctionshavemultipleoutputssimultaneously,itspinnamesattherightsideofthe
"/"signcanbeusedforhigherpriority.
2.TheOCDSDAandOCDSCKpinsaretheOCDSdedicatedpinsandonlyavailableforthe
BS82BV12A-3,BS82CV16A-3andBS82DV20A-3devices,whicharetheOCDSEVchipsforthe
BS82B12A-3,BS82C16A-3andBS82D20A-3devicesrespectively.
Pin Descriptions
Withtheexceptionofthepowerpinsandsomerelevanttransformercontrolpins,allpinsonthe
devicecanbereferencedbytheirPortname,e.g.PA0,PA1,etc,whichrefertothedigitalI/O
functionofthepins.HoweverthesePortpinsarealsosharedwithotherfunctionsuchastheTouch
Keyfunction,TimerModules,etc.Thefunctionofeachpinislistedinthefollowingtables,however
thedetailsbehindhoweachpiniscongurediscontainedinothersectionsofthedatasheet.
AsthePinDescriptiontableshowsthesituationforthepackagewiththemostpins,notallpinsin
thetablewillbeavailableonsmallerpackagesizes.
BS82B12A-3
Pin Name Function OP I/T O/T Description
PA0/TCK1/
SCOM2/
ICPDA/
OCDSDA
PA0 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
TCK1 PTM0C0 ST — PTM0 clock input
SCOM2 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPDA — ST CMOS In-circuit programming address/data pin
OCDSDA — ST CMOS On-chip debug support data/address pin, for EV chip only.
PA1/SCOM0 PA1 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM0 SLCDC0 — SCOM LCD driver output for LCD panel common
PA2/
SCOM3/
ICPCK/
OCDSCK
PA2 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM3 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPCK — ST — In-circuit programming clock pin
OCDSCK — ST — On-chip debug support clock pin, for EV chip only.

Rev. 1.20 10 January 23, 2015 Rev. 1.20 11 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PA3/SDA/
RX
PA3PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SDA IICC0 ST NMOS I2C Data
RX UCR1 ST — UART receiver data input
PA4/INT/
TCK0/
SCOM1
PA4 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
INT INTC0
INTEG ST — External interrupt
TCK0 CTM0C0 ST — CTM0 clock input
SCOM1 SLCDC0 — SCOM LCD driver output for LCD panel common
PA7/SCL/TX
PA7 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCL IICC0 ST NMOS I2C Clock
TX UCR1 — CMOS UART transmitter data output
PB0/
SSEG0/
KEY1
PB0 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG0 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY1 TKM0C1 NSI — Touch key input
PB1/
SSEG1/
KEY2
PB1 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG1 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY2 TKM0C1 NSI — Touch key input
PB2/
SSEG2/
KEY3
PB2 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG2 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY3 TKM0C1 NSI — Touch key input
PB3/
SSEG3/
KEY4
PB3 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG3 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY4 TKM0C1 NSI — Touch key input
PB4/
SSEG4/
KEY5
PB4 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG4 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY5 TKM1C1 NSI — Touch key input
PB5/
SSEG5/
KEY6
PB5 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG5 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY6 TKM1C1 NSI — Touch key input
PB6/
SSEG6/
KEY7
PB6 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG6 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY7 TKM1C1 NSI — Touch key input
PB7/
SSEG7/
KEY8
PB7 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG7 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY8 TKM1C1 NSI — Touch key input
PC0/
SSEG8/
KEY9
PC0 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG8 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY9 TKM2C1 NSI — Touch key input
PC1/
SSEG9/
KEY10
PC1 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG9 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY10 TKM2C1 NSI — Touch key input

Rev. 1.20 12 January 23, 2015 Rev. 1.20 13 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PC2/
SSEG10/
KEY11
PC2 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG10 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY11 TKM2C1 NSI — Touch key input
PC3/
SSEG11/
KEY12
PC3 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG11 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY12 TKM2C1 NSI — Touch key input
PC4/TP1_0/
SSEG12
PC4 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_0 TMPC — CMOS PTM0 output
SSEG12 SLCDC2 — CMOS LCD driver output for LCD panel segment
PC5/TP0_0/
SSEG13
PC5 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_0 TMPC — CMOS CTM0 output
SSEG13 SLCDC2 — CMOS LCD driver output for LCD panel segment
PC6/TP1_1/
SSEG14
PC6 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_1 TMPC — CMOS PTM0 output
SSEG14 SLCDC2 — CMOS LCD driver output for LCD panel segment
PC7/TP0_1/
SSEG15
PC7 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_1 TMPC — CMOS CTM0 output
SSEG15 SLCDC2 — CMOS LCD driver output for LCD panel segment
VDD VDD — PWR — Power supply
VSS VSS — PWR — Ground
Note:I/T:Inputtype;  O/T:Outputtype
OP:Optionalbycongurationoption(CO)orregisterselection
PWR:Power;  ST:SchmittTriggerinput
CMOS:CMOSoutput; NMOS:NMOSoutput;  SCOM:SCOMoutput
AN:Analoginput;NSI:Non-standardinput
ThePTMpinnamesandoutputpincontrolbitsuse"1"astheirserialnumber,butotherPTMrelatedregiter
namesorbitnamesuse"0".
BS82C16A-3
Pin Name Function OP I/T O/T Description
PA0/TCK1/
SCOM2/
ICPDA/
OCDSDA
PA0 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
TCK1 PTM0C0 ST — PTM0 clock input
SCOM2 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPDA — ST CMOS In-circuit programming address/data pin
OCDSDA — ST CMOS On-chip debug support data/address pin, for EV chip only.
PA1/SCOM0 PA1 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM0 SLCDC0 — SCOM LCD driver output for LCD panel common
PA2/
SCOM3/
ICPCK/
OCDSCK
PA2 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM3 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPCK — ST — In-circuit programming clock pin
OCDSCK — ST — On-chip debug support clock pin, for EV chip only.

Rev. 1.20 12 January 23, 2015 Rev. 1.20 13 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PA3/SDA/
RX
PA3PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SDA IICC0 ST NMOS I2C Data
RX UCR1 ST — UART receiver data input
PA4/INT/
TCK0/
SCOM1
PA4 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
INT INTC0
INTEG ST — External interrupt
TCK0 CTM0C0 ST — CTM0 clock input
SCOM1 SLCDC0 — SCOM LCD driver output for LCD panel common
PA7/SCL/TX
PA7 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCL IICC0 ST NMOS I2C Clock
TX UCR1 — CMOS UART transmitter data output
PB0/
SSEG0/
KEY1
PB0 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG0 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY1 TKM0C1 NSI — Touch key input
PB1/
SSEG1/
KEY2
PB1 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG1 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY2 TKM0C1 NSI — Touch key input
PB2/
SSEG2/
KEY3
PB2 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG2 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY3 TKM0C1 NSI — Touch key input
PB3/
SSEG3/
KEY4
PB3 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG3 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY4 TKM0C1 NSI — Touch key input
PB4/
SSEG4/
KEY5
PB4 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG4 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY5 TKM1C1 NSI — Touch key input
PB5/
SSEG5/
KEY6
PB5 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG5 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY6 TKM1C1 NSI — Touch key input
PB6/
SSEG6/
KEY7
PB6 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG6 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY7 TKM1C1 NSI — Touch key input
PB7/
SSEG7/
KEY8
PB7 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG7 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY8 TKM1C1 NSI — Touch key input
PC0/
SSEG8/
KEY9
PC0 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG8 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY9 TKM2C1 NSI — Touch key input
PC1/
SSEG9/
KEY10
PC1 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG9 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY10 TKM2C1 NSI — Touch key input

Rev. 1.20 14 January 23, 2015 Rev. 1.20 15 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PC2/
SSEG10/
KEY11
PC2 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG10 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY11 TKM2C1 NSI — Touch key input
PC3/
SSEG11/
KEY12
PC3 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG11 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY12 TKM2C1 NSI — Touch key input
PC4/
SSEG12/
KEY13
PC4 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG12 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY13 TKM3C1 NSI — Touch key input
PC5/
SSEG13/
KEY14
PC5 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG13 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY14 TKM3C1 NSI — Touch key input
PC6/TP1_1/
SSEG14/
KEY15
PC6 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_1 TMPC — CMOS PTM0 output
SSEG14 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY15 TKM3C1 NSI — Touch key input
PC7/TP0_1/
SSEG15/
KEY16
PC7 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_1 TMPC — CMOS CTM0 output
SSEG15 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY16 TKM3C1 NSI — Touch key input
PD0/TP1_0/
SSEG16/
XT1
PD0 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_0 TMPC — CMOS PTM0 output
SSEG16 SLCDC3 — CMOS LCD driver output for LCD panel segment
XT1 CO LXT — LXT pin
PD1/TP0_0/
SSEG17/
XT2
PD1 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_0 TMPC — CMOS CTM0 output
SSEG17 SLCDC3 — CMOS LCD driver output for LCD panel segment
XT2 CO — LXT LXT pin
PD2/
SSEG18
PD2 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG18 SLCDC3 — CMOS LCD driver output for LCD panel segment
PD3/
SSEG19
PD3 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG19 SLCDC3 — CMOS LCD driver output for LCD panel segment
VDD VDD — PWR — Power supply
VSS VSS — PWR — Ground
Note:I/T:Inputtype;  O/T:Outputtype
OP:Optionalbycongurationoption(CO)orregisterselection
PWR:Power;  ST:SchmittTriggerinput
CMOS:CMOSoutput; NMOS:NMOSoutput;  SCOM:SCOMoutput
AN:Analoginput;NSI:Non-standardinput
LXT:Lowfrequencycrystaloscillator
ThePTMpinnamesandoutputpincontrolbitsuse"1"astheirserialnumber,butotherPTMrelatedregiter
namesorbitnamesuse"0".

Rev. 1.20 14 January 23, 2015 Rev. 1.20 15 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82D20A-3
Pin Name Function OP I/T O/T Description
PA0/TCK1/
SCOM2/
ICPDA/
OCDSDA
PA0 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
TCK1 PTM0C0 ST — PTM0 clock input
SCOM2 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPDA — ST CMOS In-circuit programming address/data pin
OCDSDA — ST CMOS On-chip debug support data/address pin, for EV chip only.
PA1/
SCOM0/
KEY20
PA1 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM0 SLCDC0 — SCOM LCD driver output for LCD panel common
KEY20 TKM4C1 NSI — Touch key input
PA2/
SCOM3/
ICPCK/
OCDSCK
PA2 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCOM3 SLCDC0 — SCOM LCD driver output for LCD panel common
ICPCK — ST — In-circuit programming clock pin
OCDSCK — ST — On-chip debug support clock pin, for EV chip only.
PA3/SDA/RX
PA3PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SDA IICC0 ST NMOS I2C Data
RX UCR1 ST — UART receiver data input
PA4/INT/
TCK0/
SCOM1/
KEY19
PA4 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
INT INTC0
INTEG ST — External interrupt
TCK0 CTM0C0 ST — CTM0 clock input
SCOM1 SLCDC0 — SCOM LCD driver output for LCD panel common
KEY19 TKM4C1 NSI — Touch key input
PA7/SCL/TX
PA7 PAWU
PAPU ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SCL IICC0 ST NMOS I2C Clock
TX UCR1 — CMOS UART transmitter data output
PB0/SSEG0/
KEY1
PB0 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG0 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY1 TKM0C1 NSI — Touch key input
PB1/SSEG1/
KEY2
PB1 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG1 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY2 TKM0C1 NSI — Touch key input
PB2/SSEG2/
KEY3
PB2 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG2 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY3 TKM0C1 NSI — Touch key input
PB3/SSEG3/
KEY4
PB3 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG3 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY4 TKM0C1 NSI — Touch key input
PB4/SSEG4/
KEY5
PB4 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG4 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY5 TKM1C1 NSI — Touch key input

Rev. 1.20 16 January 23, 2015 Rev. 1.20 17 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PB5/SSEG5/
KEY6
PB5 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG5 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY6 TKM1C1 NSI — Touch key input
PB6/SSEG6/
KEY7
PB6 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG6 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY7 TKM1C1 NSI — Touch key input
PB7/SSEG7/
KEY8
PB7 PBPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG7 SLCDC1 — CMOS LCD driver output for LCD panel segment
KEY8 TKM1C1 NSI — Touch key input
PC0/SSEG8/
KEY11
PC0 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG8 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY11 TKM2C1 NSI — Touch key input
PC1/SSEG9/
KEY12
PC1 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG9 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY12 TKM2C1 NSI — Touch key input
PC2/
SSEG10/
KEY13
PC2 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG10 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY13 TKM2C1 NSI — Touch key input
PC3/
SSEG11/
KEY14
PC3 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG11 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY14 TKM3C1 NSI — Touch key input
PC4/
SSEG12/
KEY15
PC4 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG12 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY15 TKM3C1 NSI — Touch key input
PC5/
SSEG13/
KEY16
PC5 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG13 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY16 TKM3C1 NSI — Touch key input
PC6/TP1_1/
SSEG14/
KEY17
PC6 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_1 TMPC — CMOS PTM0 output
SSEG14 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY17 TKM4C1 NSI — Touch key input
PC7/TP0_1/
SSEG15/
KEY18
PC7 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_1 TMPC — CMOS CTM0 output
SSEG15 SLCDC2 — CMOS LCD driver output for LCD panel segment
KEY18 TKM4C1 NSI — Touch key input
PD0/TP1_0/
SSEG16/
XT1
PD0 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
TP1_0 TMPC — CMOS PTM0 output
SSEG16 SLCDC3 — CMOS LCD driver output for LCD panel segment
XT1 CO LXT — LXT pin

Rev. 1.20 16 January 23, 2015 Rev. 1.20 17 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Pin Name Function OP I/T O/T Description
PD1/TP0_0/
SSEG17/
XT2
PD1 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
TP0_0 TMPC — CMOS CTM0 output
SSEG17 SLCDC3 — CMOS LCD driver output for LCD panel segment
XT2 CO — LXT LXT pin
PD2/
SSEG18/
KEY10
PD2 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG18 SLCDC3 — CMOS LCD driver output for LCD panel segment
KEY10 TKM2C1 NSI — Touch key input
PD3/
SSEG19/
KEY9
PD3 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG19 SLCDC3 — CMOS LCD driver output for LCD panel segment
KEY9 TKM2C1 NSI — Touch key input
VDD VDD — PWR — Power supply
VSS VSS — PWR — Ground
Note:I/T:Inputtype;  O/T:Outputtype
OP:Optionalbycongurationoption(CO)orregisterselection
PWR:Power;  ST:SchmittTriggerinput
CMOS:CMOSoutput; NMOS:NMOSoutput
AN:Analoginput;NSI:Non-standardinput;  SCOM:SCOMoutput
LXT:Lowfrequencycrystaloscillator
ThePTMpinnamesandoutputpincontrolbitsuse"1"astheirserialnumber,butotherPTMrelatedregiter
namesorbitnamesuse"0".
Absolute Maximum Ratings
SupplyVoltage................................................................................................VSS−0.3VtoVSS+6.0V
InputVoltage..................................................................................................VSS−0.3VtoVDD+0.3V
StorageTemperature....................................................................................................-50˚Cto125˚C
OperatingTemperature..................................................................................................-40˚Cto85˚C
IOLTotal..................................................................................................................................... 80mA
IOHTotal....................................................................................................................................-80mA
TotalPowerDissipation......................................................................................................... 500mW
Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder"AbsoluteMaximum
Ratings"maycausesubstantialdamagetothesedevices.Functionaloperationofthesedevicesat
otherconditionsbeyondthoselistedinthespecicationisnotimpliedandprolongedexposureto
extremeconditionsmayaffectdevicesreliability.

Rev. 1.20 18 January 23, 2015 Rev. 1.20 19 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
D.C. Characteristics
Ta=25°C
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VDD Conditions
VDD Operating Voltage (HIRC) —
fSYS = 8MHz 2.7 — 5.5 V
fSYS = 12MHz 2.7 — 5.5 V
fSYS = 16MHz 4.5 — 5.5 V
IDD
Operating Current (Normal)
(HIRC, fSYS=fH, fS=fSUB)
3V No load, fH= 8MHz,
WDT enable
— 1.2 1.8 mA
5V — 2.2 3.3 mA
3V No load, fH= 12MHz,
WDT enable
— 1.6 2.4 mA
5V — 3.3 5.0 mA
3V No load, fH= 16MHz,
WDT enable
— 2.0 3.0 mA
5V — 4.0 6.0 mA
Operating Current (Normal)
(HIRC, fSYS=fL, fS=fSUB)
3V No load, fH=12MHz,
fL= fH/2, WDT enable
— 1.2 2.0 mA
5V — 2.2 3.3 mA
3V No load, fH=12MHz,
fL= fH/4, WDT enable
— 1.0 1.5 mA
5V — 1.8 2.7 mA
3V No load, fH=12MHz,
fL= fH/8, WDT enable
— 0.9 1.4 mA
5V — 1.6 2.4 mA
3V No load, fH=12MHz,
fL= fH/16, WDT enable
— 0.8 1.2 mA
5V — 1.5 2.3 mA
3V No load, fH=12MHz,
fL= fH/32, WDT enable
— 0.8 1.2 mA
5V — 1.5 2.3 mA
5V No load, fH=12MHz,
fL= fH/64, WDT enable
— 0.8 1.2 mA
3V — 1.5 2.3 mA
Operating Current (Slow)
(LXT/LIRC, fSYS=fL, fS=fSUB)
3V No load, fSYS=LXT,
WDT enable, LXTLP=0
— 19 38 μA
5V — 48 96 μA
3V No load, fSYS=LXT,
WDT enable, LXTLP=1
— 16 32 μA
5V — 36 72 μA
3V No load, fSYS=LIRC,
WDT enable
— 10 20 μA
5V — 30 50 μA

Rev. 1.20 18 January 23, 2015 Rev. 1.20 19 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VDD Conditions
ISTB
IDLE1 Mode Standby Current
(HIRC, fSYS=fH, fS=fSUB)
3V No load, system HALT, WDT
enable, fSYS = 12MHz
— 0.9 1.4 mA
5V — 1.4 2.1 mA
IDLE0 Mode Standby Current
(HIRC, fSYS=off, fS=fSUB)
3V No load, system HALT, WDT
enable, fSYS = 12MHz
— 1.4 3.0 μA
5V — 2.7 5.0 μA
IDLE1 Mode Standby Current
(HIRC, fSYS= fL, fS=fSUB)
3V No load, system HALT, WDT
enable, fSYS = 12MHz/64
— 0.7 1.1 mA
5V — 1.4 2.1 mA
IDLE0 Mode Standby Current
(HIRC, fSYS=off, fS=fSUB)
3V No load, system HALT, WDT
enable, fSYS = 12MHz/64
—1.3 3.0 μA
5V — 2.3 5.0 μA
IDLE1 Mode Standby Current
(LIRC, fSYS=fL=fLIRC, fS=fSUB=fLIRC)
3V No load, system HALT, WDT
enable, fSYS = LIRC
— 1.9 4.0 μA
5V — 3.3 7.0 μA
IDLE0 Mode Standby Current
(LXT/LIRC, fSYS=off, fS=fSUB)
3V No load, system HALT, WDT
enable, LXTLP=0 (LXT on)
— 5 10 μA
5V — 18 30 μA
3V No load, system HALT, WDT
enable, LXTLP=1 (LXT on)
— 2.5 5 μA
5V — 6 10 μA
3V No load, system HALT, WDT
enable (LIRC on)
—1.3 3.0 μA
5V — 2.4 5.0 μA
SLEEP Mode Standby Current
(HIRC, fSYS=off, fS=fSUB=off)
3V No load, system HALT, WDT
disable (LXT and LIRC off)
— 0.1 1 μA
5V — 0.3 2 μA
SLEEP Mode Standby Current
(LXT/LIRC, fSYS=off, fS=fSUB=off)
3V No load, system HALT, WDT
disable (LXT and LIRC off)
— 0.1 1 μA
5V — 0.3 2 μA
VIL
Input Low Voltage for I/O Ports
or Input Pins
5V —0 — 1.5 V
— 0 — 0.2VDD V
VIH
Input High Voltage for I/O Ports
or Input Pins
5V —3.5 — 5.0 V
— 0.8VDD — VDD V
VLVR Low Voltage Reset Voltage — LVR enable, 2.55V -5% 2.55 +5% V
VLVDLow Voltage Detector Voltage —
LVDEN = 1, VLVD = 2.7V -5% 2.7 +5% V
LVDEN = 1, VLVD = 3.0V -5% 3.0 +5% V
LVDEN = 1, VLVD = 3.3V -5% 3.3 +5% V
LVDEN = 1, VLVD = 3.6V -5% 3.6 +5% V
LVDEN = 1, VLVD = 4.0V -5% 4.0 +5% V
IOL I/O Port Sink Current 3V VOL=0.1VDD 16 32 — mA
5V VOL=0.1VDD 32 64 — mA
IOH I/O Port Source Current
3V VOH = 0.9VDD, PxPS=00 -1.0 -2.0 — mA
5V VOH = 0.9VDD, PxPS=00 -2.0 -4.0 — mA
3V VOH = 0.9VDD, PxPS=01 -1.75 -3.5 — mA
5V VOH = 0.9VDD, PxPS=01 -3.5 -7.0 — mA
3V VOH = 0.9VDD, PxPS=10 -2.5 -5.0 — mA
5V VOH = 0.9VDD, PxPS=10 -5.0 -10 — mA
3V VOH = 0.9VDD, PxPS=11 -5.5 -11 — mA
5V VOH = 0.9VDD, PxPS=11 -11 -22 — mA

Rev. 1.20 20 January 23, 2015 Rev. 1.20 21 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VDD Conditions
RPH
Pull-high Resistance for I/O
Ports
3V — 20 60 100 kΩ
5V — 10 30 50 kΩ
VBG
Bandgap Reference with Buffer
Voltage — — -3% 1.09 +3% V
A.C. Characteristics
Ta=25°C
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VDD Conditions
fSYS System Clock (HIRC) 3V/5V Ta=25°C
-2% 8 +2% MHz
-2% 12 +2% MHz
-2% 16 +2% MHz
tTIMER Timer Input Pulse Width — — 0.3 — — μs
fLIRC System Clock (32kHz) 5V Ta = 25°C -10% 32 +10% kHz
fLXT System Clock (LXT) — — — 32768 — Hz
tINT Interrupt Pulse Width — — 1 5 10 μs
tLVR Low Voltage Width to Reset — — 120 240 480 μs
tLVDLow Voltage Width to Interrupt — — 60 120 240 μs
tLVDS LVDO stable time — — — — 15 μs
tEERD EEPROM Read Time — — 1 2 4 tSYS
tEEWR EEPROM Write Time — — 1 2 4 ms
tRSTD
System Reset Delay Time
(Power on reset, LVR reset,
WDT S/W reset (WDTC))
— — 25 50 100 ms
System Reset Delay Time
(WDT normal reset) — — 8.3 16.7 33.3 ms
tSST
System Start-up Timer Period
(Wake-up from HALT) —
fSYS=LXT 1024 — —
tSYS
fSYS=HIRC 16 — —
fSYS=LIRC 2 — —
System Start-up Timer Period
(Wake-up from HALT, fSYS on at
HALT state)
— — 2 — —
Note: tSYS = 1/fSYS