Holtek HT68F Series User manual

Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Revision: V2.10 Date: July 02, 2014July 02, 2014

Rev. 2.10 2 July 02, 2014 Rev. 2.10 3 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Table of Contents
Features............................................................................................................ 8
CPU Features ......................................................................................................................... 8
Peripheral Features................................................................................................................. 9
General Description....................................................................................... 10
Selection Table................................................................................................11
Block Diagram................................................................................................ 12
Pin Assignment.............................................................................................. 13
Pin Description .............................................................................................. 17
Absolute Maximum Ratings.......................................................................... 22
D.C. Characteristics....................................................................................... 22
A.C. Characteristics....................................................................................... 24
Comparator Electrical Characteristics ........................................................ 25
Power-on Reset Characteristics................................................................... 25
System Architecture...................................................................................... 26
Clocking and Pipelining......................................................................................................... 26
Program Counter................................................................................................................... 27
Stack ..................................................................................................................................... 28
Arithmetic and Logic Unit – ALU ........................................................................................... 28
Flash Program Memory................................................................................. 29
Structure................................................................................................................................ 29
Special Vectors ..................................................................................................................... 30
Look-up Table........................................................................................................................ 30
Table Program Example........................................................................................................ 31
In Circuit Programming ......................................................................................................... 32
RAM Data Memory ......................................................................................... 33
Structure................................................................................................................................ 33
Special Function Register Description........................................................ 37
Indirect Addressing Registers – IAR0, IAR1 ......................................................................... 37
Memory Pointers – MP0, MP1 .............................................................................................. 37
Bank Pointer – BP................................................................................................................. 38
Accumulator – ACC............................................................................................................... 40
Program Counter Low Register – PCL.................................................................................. 40
Look-up Table Registers – TBLP, TBHP, TBLH..................................................................... 40
Status Register – STATUS.................................................................................................... 41

Rev. 2.10 2 July 02, 2014 Rev. 2.10 3 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
EEPROM Data Memory.................................................................................. 43
EEPROM Data Memory Structure ........................................................................................ 43
EEPROM Registers .............................................................................................................. 43
Reading Data from the EEPROM ......................................................................................... 47
Writing Data to the EEPROM................................................................................................ 47
Write Protection..................................................................................................................... 47
EEPROM Interrupt ................................................................................................................ 47
Programming Considerations................................................................................................ 48
Oscillator ........................................................................................................ 49
Oscillator Overview ............................................................................................................... 49
System Clock Congurations................................................................................................ 49
External Crystal/Ceramic Oscillator – HXT ........................................................................... 51
External RC Oscillator – ERC ............................................................................................... 52
Internal RC Oscillator – HIRC ............................................................................................... 52
External 32.768kHz Crystal Oscillator – LXT ........................................................................ 53
LXT Oscillator Low Power Function ...................................................................................... 54
Internal 32kHz Oscillator – LIRC........................................................................................... 54
Supplementary Oscillators .................................................................................................... 54
Operating Modes and System Clocks ......................................................... 55
System Clocks ...................................................................................................................... 55
System Operation Modes...................................................................................................... 57
Control Register .................................................................................................................... 58
Fast Wake-up ........................................................................................................................ 60
Operating Mode Switching and Wake-up.............................................................................. 61
NORMAL Mode to SLOW Mode Switching ........................................................................... 62
SLOW Mode to NORMAL Mode Switching ........................................................................... 63
Entering the SLEEP1 Mode .................................................................................................. 64
Entering the IDLE0 Mode...................................................................................................... 64
Entering the IDLE1 Mode...................................................................................................... 65
Standby Current Considerations ........................................................................................... 65
Wake-up................................................................................................................................ 66
Programming Considerations................................................................................................ 66
Watchdog Timer............................................................................................. 67
Watchdog Timer Clock Source.............................................................................................. 67
Watchdog Timer Control Register ......................................................................................... 67
Watchdog Timer Operation ................................................................................................... 68
Reset and Initialisation.................................................................................. 69
Reset Functions .................................................................................................................... 69
Reset Initial Conditions ......................................................................................................... 72

Rev. 2.10 4 July 02, 2014 Rev. 2.10 5 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Input/Output Ports ......................................................................................... 82
Pull-high Resistors ................................................................................................................ 84
Port A Wake-up ..................................................................................................................... 86
I/O Port Control Registers ..................................................................................................... 86
Pin-remapping Functions ...................................................................................................... 89
Pin-remapping Registers....................................................................................................... 89
I/O Pin Structures.................................................................................................................. 96
Programming Considerations................................................................................................ 96
Timer Modules – TM ...................................................................................... 97
Introduction ........................................................................................................................... 97
TM Operation ........................................................................................................................ 98
TM Clock Source................................................................................................................... 98
TM Interrupts......................................................................................................................... 98
TM External Pins................................................................................................................... 98
TM Input/Output Pin Control Registers ................................................................................. 99
Programming Considerations.............................................................................................. 109
Compact Type TM .........................................................................................110
Compact TM Operation........................................................................................................110
Compact Type TM Register Description...............................................................................111
Compact Type TM Operating Modes ...................................................................................115
Compare Match Output Mode..............................................................................................115
Timer/Counter Mode ............................................................................................................115
PWM Output Mode...............................................................................................................118
Standard Type TM – STM ............................................................................ 121
Standard TM Operation....................................................................................................... 121
Standard Type TM Register Description ............................................................................. 122
Standard Type TM Operating Modes .................................................................................. 131
Compare Output Mode........................................................................................................ 131
Timer/Counter Mode ........................................................................................................... 134
PWM Output Mode.............................................................................................................. 134
Single Pulse Mode .............................................................................................................. 138
Capture Input Mode ............................................................................................................ 140
Enhanced Type TM – ETM........................................................................... 142
Enhanced TM Operation ..................................................................................................... 143
Enhanced Type TM Register Description............................................................................ 143
Enhanced Type TM Operating Modes................................................................................. 150
Compare Output Mode........................................................................................................ 150
Timer/Counter Mode ........................................................................................................... 155
PWM Output Mode.............................................................................................................. 155
Single Pulse Output Mode .................................................................................................. 161
Capture Input Mode ............................................................................................................ 163

Rev. 2.10 4 July 02, 2014 Rev. 2.10 5 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Comparators ................................................................................................ 166
Comparator Operation ........................................................................................................ 166
Comparator Registers ......................................................................................................... 166
Comparator Interrupt........................................................................................................... 169
Programming Considerations.............................................................................................. 169
Serial Interface Module – SIM ..................................................................... 169
SPI Interface ....................................................................................................................... 170
SPI Registers ...................................................................................................................... 171
SPI Communication ............................................................................................................ 174
I2C Interface ........................................................................................................................ 176
I2C Interface Operation........................................................................................................ 176
I2C Registers ....................................................................................................................... 177
I2C Bus Communication ...................................................................................................... 181
I2C Bus Start Signal............................................................................................................. 182
Slave Address ..................................................................................................................... 182
I2C Bus Read/Write Signal .................................................................................................. 183
I2C Bus Data and Acknowledge Signal ............................................................................... 183
Peripheral Clock Output.............................................................................. 185
Peripheral Clock Operation ................................................................................................. 185
Interrupts ...................................................................................................... 186
Interrupt Registers............................................................................................................... 186
Interrupt Operation .............................................................................................................. 200
External Interrupt................................................................................................................. 204
Comparator Interrupt........................................................................................................... 204
Multi-function Interrupt ........................................................................................................ 205
Time Base Interrupts........................................................................................................... 205
Serial Interface Module Interrupt......................................................................................... 207
External Peripheral Interrupt ............................................................................................... 207
EEPROM Interrupt .............................................................................................................. 207
LVD Interrupt ....................................................................................................................... 208
TM Interrupts....................................................................................................................... 208
Interrupt Wake-up Function................................................................................................. 208
Programming Considerations.............................................................................................. 209
Power Down Mode and Wake-up................................................................ 210
Entering the IDLE or SLEEP Mode ..................................................................................... 210
Standby Current Considerations ......................................................................................... 210
Wake-up...............................................................................................................................211
Low Voltage Detector – LVD ....................................................................... 212
LVD Register ....................................................................................................................... 212
LVD Operation..................................................................................................................... 213

Rev. 2.10 6 July 02, 2014 Rev. 2.10 7 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
SCOM Function for LCD.............................................................................. 214
LCD Operation .................................................................................................................... 214
LCD Bias Control ................................................................................................................ 215
Conguration Options................................................................................. 217
Application Circuits..................................................................................... 218
UART Module Serial Interface .................................................................... 219
UART Module Features....................................................................................................... 219
UART Module Overview...................................................................................................... 219
UART Module Block Diagram ............................................................................................. 219
Pin Assignment ................................................................................................................... 220
UART Module Pin Description............................................................................................. 222
UART Module D.C. Characteristics..................................................................................... 223
UART Module A.C. Characteristics ..................................................................................... 224
UART Module Functional Description ................................................................................. 224
UART Module Internal Signal.............................................................................................. 225
UART Module SPI Interface ................................................................................................ 225
UART Module External Pin Interfacing................................................................................ 226
UART Data Transfer Scheme.............................................................................................. 227
UART Commands ............................................................................................................... 227
UART Status and Control Registers.................................................................................... 228
Baud Rate Generator .......................................................................................................... 233
UART Module Setup and Control........................................................................................ 235
Managing Receiver Errors .................................................................................................. 240
UART Module Interrupt Structure........................................................................................ 241
UART Module Power-down and Wake-up .......................................................................... 242
Using the UART Function.................................................................................................... 243
Application Circuit with UART Module................................................................................. 244
Instruction Set.............................................................................................. 245
Introduction ......................................................................................................................... 245
Instruction Timing ................................................................................................................ 245
Moving and Transferring Data............................................................................................. 245
Arithmetic Operations.......................................................................................................... 245
Logical and Rotate Operation ............................................................................................. 246
Branches and Control Transfer ........................................................................................... 246
Bit Operations ..................................................................................................................... 246
Table Read Operations ....................................................................................................... 246
Other Operations................................................................................................................. 246
Instruction Set Summary ............................................................................ 247
Table Conventions............................................................................................................... 247
Instruction Denition................................................................................... 249

Rev. 2.10 6 July 02, 2014 Rev. 2.10 7 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Package Information ................................................................................... 258
16-pin DIP (300mil) Outline Dimensions ............................................................................. 259
16-pin NSOP (150mil) Outline Dimensions......................................................................... 261
16-pin SSOP (150mil) Outline Dimensions ......................................................................... 262
20-pin DIP (300mil) Outline Dimensions ............................................................................. 263
20-pin SOP (300mil) Outline Dimensions ........................................................................... 265
20-pin SSOP (150mil) Outline Dimensions ......................................................................... 266
24-pin SKDIP (300mil) Outline Dimensions ........................................................................ 267
24-pin SOP (300mil) Outline Dimensions ........................................................................... 269
24-pin SSOP (150mil) Outline Dimensions ......................................................................... 270
28-pin SKDIP (300mil) Outline Dimensions ........................................................................ 271
28-pin SOP (300mil) Outline Dimensions ........................................................................... 272
28-pin SSOP (150mil) Outline Dimensions ......................................................................... 273
SAW Type 32-pin (5mm×5mm) QFN Outline Dimensions .................................................. 274
SAW Type 40-pin (6mm×6mm for 0.75mm) QFN Outline Dimensions............................... 275
44-pin LQFP (10mm×10mm) (FP 2.0mm) Outline Dimensions .......................................... 276
48-pin SSOP (300mil) Outline Dimensions ......................................................................... 277
SAW Type 48-pin (7mm×7mm) QFN Outline Dimensions .................................................. 278
48-pin LQFP (7mm×7mm) Outline Dimensions .................................................................. 279

Rev. 2.10 8 July 02, 2014 Rev. 2.10 9 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Features
CPU Features
• OperatingVoltage:

♦fSYS=8MHz:2.2V~5.5V

♦fSYS=12MHz:2.7V~5.5V

♦fSYS=20MHz:4.5V~5.5V
• Upto0.2μsinstructioncyclewith20MHzsystemclockatVDD=5V
• Powerdownandwake-upfunctionstoreducepowerconsumption
• Fiveoscillators:

♦ExternalCrystal--HXT

♦External32.768kHzCrystal--LXT

♦ExternalRC--ERC

♦InternalRC--HIRC

♦Internal32kHzRC--LIRC
• Multi-modeoperation:NORMAL,SLOW,IDLEandSLEEP
• Fullyintegratedinternal4MHz,8MHzand12MHzoscillatorrequiresnoexternalcomponents
• Allinstructionsexecutedinoneortwoinstructioncycles
• Tablereadinstructions
• 63powerfulinstructions
• Upto12-levelsubroutinenesting
• Bitmanipulationinstruction

Rev. 2.10 8 July 02, 2014 Rev. 2.10 9 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
Peripheral Features
• FlashProgramMemory:1K×14~12K×16
• RAMDataMemory:64×8~576×8
•True EEPROMMemory:32×8~256×8
• WatchdogTimerfunction
• Upto50bidirectionalI/Olines
• Softwarecontrolled4-SCOMlinesLCDdriverwith1/2bias
• Multiplepin-sharedexternalinterrupts
• MultipleTimerModulefortimemeasure,inputcapture,comparematchoutput,PWMoutputor
singlepulseoutputfunction
• SerialInterfacesModule–SIMforSPIorI2C
•DualComparatorfunctions
• DualTime-Basefunctionsforgenerationofxedtimeinterruptsignals
• Lowvoltageresetfunction
• Lowvoltagedetectfunction
• Optionalperipheral--UARTmoduleforfullyduplexasynchronouscommunication
• Widerangeofavailablepackagetypes
• Flashprogrammemorycanbere-programmedupto100,000times
• Flashprogrammemorydataretention>10years
• EEPROMdatamemorycanbere-programmedupto1,000,000times
• EEPROMdatamemorydataretention>10years

Rev. 2.10 10 July 02, 2014 Rev. 2.10 11 July 02, 2014
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
General Description
TheHT68FXXseriesofdevicesareFlashMemoryI/Otype8-bithighperformanceRISC
architecturemicrocontrollers.OfferinguserstheconvenienceofFlashMemorymulti-programming
features,thesedevicesalsoincludeawiderangeoffunctionsandfeatures.Othermemoryincludes
an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-
volatile data such as serial numbers, calibration data etc. Multiple and extremely flexible Timer
Modules provide timing, pulse generation and PWM generation functions. Analog features
include dual comparator functions. Communication with the outside world is catered for by
including fully integrated SPI or I2C interface functions, two popular interfaces which provide
designers with a means of easy communication with external peripheral hardware. Protective
features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector
coupled with excellent noise immunity and ESD protection ensure that reliable operation is
maintainedinhostileelectricalenvironments.
AfullchoiceofHXT,LXT,ERC,HIRCandLIRCoscillatorfunctionsareprovidedincludinga
fullyintegratedsystemoscillatorwhichrequiresnoexternalcomponentsforits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.
TheUARTmoduleiscontainedintheHT68FUx0seriesof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.
TheinclusionofexibleI/Oprogrammingfeatures,Time-Basefunctionsalongwithmanyother
featuresensurethatthedeviceswillndexcellentuseinapplicationssuchaselectronicmetering,
environmentalmonitoring,handheldinstruments,householdappliances,electronicallycontrolled
tools,motordrivinginadditiontomanyothers.