Silicon Laboratories C8051F341 User manual

Full Speed USB Flash MCU Family
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Rev. 1.4 9/09 Copyright © 2009 by Silicon Laboratories C8051F34x
Analog Peripherals
-10-Bit ADC (C8051F340/1/2/3/4/5/6/7/A/B only)
•Up to 200 ksps
•Built-in analog multiplexer with single-ended and 
differential mode
•VREF from external pin, internal reference, or VDD
•Built-in temperature sensor
•External conversion start input option
-Two comparators
-Internal voltage reference
(C8051F340/1/2/3/4/5/6/7/A/B only)
-Brown-out detector and POR Circuitry
USB Function Controller
-USB specification 2.0 compliant
-Full speed (12 Mbps) or low speed (1.5 Mbps) operation
-Integrated clock recovery; no external crystal required for
full speed or low speed
-Supports eight flexible endpoints
-1 kB USB buffer memory
-Integrated transceiver; no external resistors required
On-Chip Debug
-On-chip debug circuitry facilitates full speed, non-intru-
sive in-system debug (No emulator required)
-Provides breakpoints, single stepping, 
inspect/modify memory and registers
-Superior performance to emulation systems using
ICE-chips, target pods, and sockets
Voltage Supply Input: 2.7 to 5.25 V
-Voltages from 3.6 to 5.25 V supported using On-Chip 
Voltage Regulator
HIgh Speed 8051 µC Core
-Pipelined instruction architecture; executes 70% of
Instructions in 1 or 2 system clocks
-48 MIPS and 25 MIPS versions available.
-Expanded interrupt handler
Memory
-4352 or 2304 Bytes RAM
-64 or 32 kB Flash; In-system programmable in 512-byte
sectors
Digital Peripherals
-40/25 Port I/O; All 5 V tolerant with high sink current
-Hardware enhanced SPI™, SMBus™, and one or two
enhanced UART serial ports
-Four general purpose 16-bit counter/timers
-16-bit programmable counter array (PCA) with five cap-
ture/compare modules
-External Memory Interface (EMIF)
Clock Sources
-Internal Oscillator: ±0.25% accuracy with clock recovery
enabled. Supports all USB and UART modes
-External Oscillator: Crystal, RC, C, or clock (1 or 2 Pin
modes)
-Low Frequency (80 kHz) Internal Oscillator
-Can switch between clock sources on-the-fly
Packages
-48-pin TQFP (C8051F340/1/4/5/8/C)
-32-pin LQFP (C8051F342/3/6/7/9/A/B/D)
-5x5 mm 32-pin QFN (C8051F342/3/6/7/9/A/B)
Temperature Range: –40 to +85 °C
ANALOG
PERIPHERALS
10-bit
200 ksps
ADC
64/32 kB
ISP FLASH 4/2 kB RAM
POR
DEBUG
CIRCUITRY
FLEXIBLE
INTERRUPTS
8051 CPU
(48/25 MIPS)
DIGITAL I/O
PRECISION INTERNAL
OSCILLATORS
HIGH-SPEED CONTROLLER CORE
A
M
U
X
CROSSBAR
+
-
WDT
+
-
USB Controller /
Transceiver
Port 0
Port 1
Port 2
Port 3
TEMP
SENSOR VREG
VREF Port 4
Ext. Memory I/F
48 Pin Only
UART0
SMBus
PCA
4 Timers
SPI
UART1*
C8051F340/1/2/34/5/6/7/A/B Only * C8051F340/1/4/5/8/A/B/C Only

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
2 Rev. 1.4

Rev. 1.3 3
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Table of Contents
1. System Overview.................................................................................................... 17
2. Absolute Maximum Ratings .................................................................................. 24
3. Global DC Electrical Characteristics.................................................................... 25
4. Pinout and Package Definitions............................................................................ 28
5. 10-Bit ADC (ADC0, C8051F340/1/2/3/4/5/6/7/A/B Only)........................................ 41
5.1. Analog Multiplexer ............................................................................................ 42
5.2. Temperature Sensor......................................................................................... 43
5.3. Modes of Operation .......................................................................................... 45
5.3.1. Starting a Conversion............................................................................... 45
5.3.2. Tracking Modes........................................................................................ 46
5.3.3. Settling Time Requirements..................................................................... 47
5.4. Programmable Window Detector...................................................................... 52
5.4.1. Window Detector In Single-Ended Mode ................................................. 54
5.4.2. Window Detector In Differential Mode...................................................... 55
6. Voltage Reference (C8051F340/1/2/3/4/5/6/7/A/B Only)....................................... 57
7. Comparators........................................................................................................... 59
8. Voltage Regulator (REG0)...................................................................................... 69
8.1. Regulator Mode Selection................................................................................. 69
8.2. VBUS Detection................................................................................................ 69
9. CIP-51 Microcontroller........................................................................................... 73
9.1. Instruction Set................................................................................................... 74
9.1.1. Instruction and CPU Timing ..................................................................... 74
9.1.2. MOVX Instruction and Program Memory ................................................. 75
9.2. Memory Organization........................................................................................ 79
9.2.1. Program Memory...................................................................................... 80
9.2.2. Data Memory............................................................................................ 81
9.2.3. General Purpose Registers...................................................................... 81
9.2.4. Bit Addressable Locations........................................................................ 81
9.2.5. Stack ....................................................................................................... 81
9.2.6. Special Function Registers....................................................................... 82
9.2.7. Register Descriptions............................................................................... 86
9.3. Interrupt Handler............................................................................................... 88
9.3.1. MCU Interrupt Sources and Vectors ........................................................ 88
9.3.2. External Interrupts.................................................................................... 88
9.3.3. Interrupt Priorities..................................................................................... 89
9.3.4. Interrupt Latency ...................................................................................... 89
9.3.5. Interrupt Register Descriptions................................................................. 90
9.4. Power Management Modes.............................................................................. 97
9.4.1. Idle Mode.................................................................................................. 97
9.4.2. Stop Mode................................................................................................ 97
10.Prefetch Engine...................................................................................................... 99
11.Reset Sources....................................................................................................... 100
11.1.Power-On Reset............................................................................................. 101

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11.2.Power-Fail Reset / VDD Monitor .................................................................... 102
11.3.External Reset................................................................................................ 103
11.4.Missing Clock Detector Reset ........................................................................ 103
11.5.Comparator0 Reset........................................................................................ 103
11.6.PCA Watchdog Timer Reset .......................................................................... 103
11.7.Flash Error Reset ........................................................................................... 103
11.8.Software Reset............................................................................................... 104
11.9.USB Reset...................................................................................................... 104
12.Flash Memory ....................................................................................................... 107
12.1.Programming The Flash Memory................................................................... 107
12.1.1.Flash Lock and Key Functions............................................................... 107
12.1.2.Flash Erase Procedure .......................................................................... 107
12.1.3.Flash Write Procedure ........................................................................... 108
12.2.Non-Volatile Data Storage.............................................................................. 109
12.3.Security Options............................................................................................. 109
13.External Data Memory Interface and On-Chip XRAM........................................ 114
13.1.Accessing XRAM............................................................................................ 114
13.1.1.16-Bit MOVX Example........................................................................... 114
13.1.2.8-Bit MOVX Example............................................................................. 114
13.2.Accessing USB FIFO Space .......................................................................... 115
13.3.Configuring the External Memory Interface.................................................... 116
13.4.Port Configuration........................................................................................... 116
13.5.Multiplexed and Non-multiplexed Selection.................................................... 119
13.5.1.Multiplexed Configuration....................................................................... 119
13.5.2.Non-multiplexed Configuration............................................................... 120
13.6.Memory Mode Selection................................................................................. 120
13.6.1.Internal XRAM Only ............................................................................... 121
13.6.2.Split Mode without Bank Select.............................................................. 121
13.6.3.Split Mode with Bank Select................................................................... 122
13.6.4.External Only.......................................................................................... 122
13.7.Timing .......................................................................................................... 122
13.7.1.Non-multiplexed Mode........................................................................... 124
13.7.2.Multiplexed Mode................................................................................... 127
14.Oscillators............................................................................................................. 131
14.1.Programmable Internal High-Frequency (H-F) Oscillator............................... 132
14.1.1.Internal H-F Oscillator Suspend Mode................................................... 132
14.2.Programmable Internal Low-Frequency (L-F) Oscillator ................................ 133
14.2.1.Calibrating the Internal L-F Oscillator..................................................... 133
14.3.External Oscillator Drive Circuit...................................................................... 135
14.3.1.Clocking Timers Directly Through the External Oscillator...................... 135
14.3.2.External Crystal Example....................................................................... 135
14.3.3.External RC Example............................................................................. 136
14.3.4.External Capacitor Example................................................................... 136
14.4.4x Clock Multiplier .......................................................................................... 138
14.5.System and USB Clock Selection .................................................................. 139

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14.5.1.System Clock Selection ......................................................................... 139
14.5.2.USB Clock Selection.............................................................................. 139
15.Port Input/Output.................................................................................................. 142
15.1.Priority Crossbar Decoder.............................................................................. 144
15.2.Port I/O Initialization ....................................................................................... 147
15.3.General Purpose Port I/O............................................................................... 150
16.Universal Serial Bus Controller (USB0).............................................................. 159
16.1.Endpoint Addressing ...................................................................................... 160
16.2.USB Transceiver ............................................................................................ 160
16.3.USB Register Access..................................................................................... 162
16.4.USB Clock Configuration................................................................................ 166
16.5.FIFO Management ......................................................................................... 167
16.5.1.FIFO Split Mode..................................................................................... 167
16.5.2.FIFO Double Buffering........................................................................... 168
16.5.3.FIFO Access .......................................................................................... 168
16.6.Function Addressing....................................................................................... 169
16.7.Function Configuration and Control................................................................ 169
16.8.Interrupts ........................................................................................................ 172
16.9.The Serial Interface Engine............................................................................ 176
16.10.Endpoint0 ..................................................................................................... 176
16.10.1.Endpoint0 SETUP Transactions .......................................................... 177
16.10.2.Endpoint0 IN Transactions................................................................... 177
16.10.3.Endpoint0 OUT Transactions............................................................... 178
16.11.Configuring Endpoints1-3............................................................................. 180
16.12.Controlling Endpoints1-3 IN.......................................................................... 180
16.12.1.Endpoints1-3 IN Interrupt or Bulk Mode............................................... 180
16.12.2.Endpoints1-3 IN Isochronous Mode..................................................... 181
16.13.Controlling Endpoints1-3 OUT...................................................................... 183
16.13.1.Endpoints1-3 OUT Interrupt or Bulk Mode........................................... 183
16.13.2.Endpoints1-3 OUT Isochronous Mode................................................. 184
17.SMBus ................................................................................................................... 188
17.1.Supporting Documents................................................................................... 189
17.2.SMBus Configuration...................................................................................... 189
17.3.SMBus Operation........................................................................................... 189
17.3.1.Arbitration............................................................................................... 190
17.3.2.Clock Low Extension.............................................................................. 191
17.3.3.SCL Low Timeout................................................................................... 191
17.3.4.SCL High (SMBus Free) Timeout .......................................................... 191
17.4.Using the SMBus............................................................................................ 191
17.4.1.SMBus Configuration Register............................................................... 192
17.4.2.SMB0CN Control Register..................................................................... 195
17.4.3.Data Register......................................................................................... 198
17.5.SMBus Transfer Modes.................................................................................. 198
17.5.1.Master Transmitter Mode....................................................................... 198
17.5.2.Master Receiver Mode........................................................................... 200

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17.5.3.Slave Receiver Mode............................................................................. 201
17.5.4.Slave Transmitter Mode......................................................................... 202
17.6.SMBus Status Decoding................................................................................. 202
18.UART0.................................................................................................................... 205
18.1.Enhanced Baud Rate Generation................................................................... 206
18.2.Operational Modes......................................................................................... 206
18.2.1.8-Bit UART............................................................................................. 207
18.2.2.9-Bit UART............................................................................................. 208
18.3.Multiprocessor Communications .................................................................... 208
19.UART1 (C8051F340/1/4/5/8/A/B/C Only).............................................................. 213
19.1.Baud Rate Generator ..................................................................................... 214
19.2.Data Format.................................................................................................... 215
19.3.Configuration and Operation .......................................................................... 216
19.3.1.Data Transmission................................................................................. 216
19.3.2.Data Reception ...................................................................................... 216
19.3.3.Multiprocessor Communications............................................................ 217
20.Enhanced Serial Peripheral Interface (SPI0)...................................................... 222
20.1.Signal Descriptions......................................................................................... 223
20.1.1.Master Out, Slave In (MOSI).................................................................. 223
20.1.2.Master In, Slave Out (MISO).................................................................. 223
20.1.3.Serial Clock (SCK)................................................................................. 223
20.1.4.Slave Select (NSS) ................................................................................ 223
20.2.SPI0 Master Mode Operation......................................................................... 224
20.3.SPI0 Slave Mode Operation........................................................................... 226
20.4.SPI0 Interrupt Sources................................................................................... 226
20.5.Serial Clock Timing......................................................................................... 227
20.6.SPI Special Function Registers...................................................................... 229
21.Timers.................................................................................................................... 235
21.1.Timer 0 and Timer 1....................................................................................... 235
21.1.1.Mode 0: 13-bit Counter/Timer................................................................ 235
21.1.2.Mode 1: 16-bit Counter/Timer................................................................ 236
21.1.3.Mode 2: 8-bit Counter/Timer with Auto-Reload...................................... 237
21.1.4.Mode 3: Two 8-bit Counter/Timers (Timer 0 Only)................................. 238
21.2.Timer 2 .......................................................................................................... 243
21.2.1.16-bit Timer with Auto-Reload................................................................ 243
21.2.2.8-bit Timers with Auto-Reload................................................................ 244
21.2.3.Timer 2 Capture Modes: USB Start-of-Frame or LFO Falling Edge ...... 245
21.3.Timer 3 .......................................................................................................... 249
21.3.1.16-bit Timer with Auto-Reload................................................................ 249
21.3.2.8-bit Timers with Auto-Reload................................................................ 250
21.3.3.USB Start-of-Frame Capture.................................................................. 251
22.Programmable Counter Array (PCA0)................................................................ 255
22.1.PCA Counter/Timer........................................................................................ 256
22.2.Capture/Compare Modules ............................................................................ 257
22.2.1.Edge-triggered Capture Mode................................................................ 258

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22.2.2.Software Timer (Compare) Mode........................................................... 259
22.2.3.High Speed Output Mode....................................................................... 260
22.2.4.Frequency Output Mode ........................................................................ 261
22.2.5.8-Bit Pulse Width Modulator Mode......................................................... 262
22.2.6.16-Bit Pulse Width Modulator Mode....................................................... 263
22.3.Watchdog Timer Mode................................................................................... 264
22.3.1.Watchdog Timer Operation.................................................................... 264
22.3.2.Watchdog Timer Usage ......................................................................... 265
22.4.Register Descriptions for PCA........................................................................ 266
23.C2 Interface........................................................................................................... 271
23.1.C2 Interface Registers.................................................................................... 271
23.2.C2 Pin Sharing ............................................................................................... 273
Document Change List............................................................................................. 274
Contact Information.................................................................................................. 276

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
8 Rev. 1.3
List of Figures
1. System Overview
Figure 1.1. C8051F340/1/4/5 Block Diagram........................................................... 19
Figure 1.2. C8051F342/3/6/7 Block Diagram........................................................... 20
Figure 1.3. C8051F348/C Block Diagram................................................................. 21
Figure 1.4. C8051F349/D Block Diagram................................................................. 22
Figure 1.5. C8051F34A/B Block Diagram ................................................................ 23
4. Pinout and Package Definitions
Figure 4.1. TQFP-48 Pinout Diagram (Top View) .................................................... 31
Figure 4.2. TQFP-48 Package Diagram................................................................... 32
Figure 4.3. TQFP-48 Recommended PCB Land Pattern......................................... 33
Figure 4.4. LQFP-32 Pinout Diagram (Top View)..................................................... 34
Figure 4.5. LQFP-32 Package Diagram................................................................... 35
Figure 4.6. LQFP-32 Recommended PCB Land Pattern ......................................... 36
Figure 4.7. QFN-32 Pinout Diagram (Top View) ...................................................... 37
5. 10-Bit ADC (ADC0, C8051F340/1/2/3/4/5/6/7/A/B Only)
Figure 5.1. ADC0 Functional Block Diagram............................................................ 41
Figure 5.2. Temperature Sensor Transfer Function................................................. 43
Figure 5.3. Temperature Sensor Error with 1-Point Calibration (VREF = 2.40 V).... 44
Figure 5.4. 10-Bit ADC Track and Conversion Example Timing .............................. 46
Figure 5.5. ADC0 Equivalent Input Circuits.............................................................. 47
Figure 5.6. ADC Window Compare Example: Right-Justified Single-Ended Data... 54
Figure 5.7. ADC Window Compare Example: Left-Justified Single-Ended Data...... 54
Figure 5.8. ADC Window Compare Example: Right-Justified Differential Data........ 55
Figure 5.9. ADC Window Compare Example: Left-Justified Differential Data.......... 55
6. Voltage Reference (C8051F340/1/2/3/4/5/6/7/A/B Only)
Figure 6.1. Voltage Reference Functional Block Diagram........................................ 57
7. Comparators
Figure 7.1. Comparator Functional Block Diagram .................................................. 60
Figure 7.2. Comparator Hysteresis Plot ................................................................... 61
8. Voltage Regulator (REG0)
Figure 8.1. REG0 Configuration: USB Bus-Powered............................................... 70
Figure 8.2. REG0 Configuration: USB Self-Powered............................................... 70
Figure 8.3. REG0 Configuration: USB Self-Powered, Regulator Disabled............... 71
Figure 8.4. REG0 Configuration: No USB Connection............................................. 71
9. CIP-51 Microcontroller
Figure 9.1. CIP-51 Block Diagram............................................................................ 73
Figure 9.2. On-Chip Memory Map for 64 kB Devices............................................... 79
Figure 9.3. On-Chip Memory Map for 32 kB Devices............................................... 80
11. Reset Sources
Figure 11.1. Reset Sources.................................................................................... 100
Figure 11.2. Power-On and VDD Monitor Reset Timing ........................................ 101

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12. Flash Memory
Figure 12.1. Flash Program Memory Map and Security Byte................................. 110
13. External Data Memory Interface and On-Chip XRAM
Figure 13.1. USB FIFO Space and XRAM Memory Map 
with USBFAE set to ‘1’...................................................................................... 115
Figure 13.2. Multiplexed Configuration Example.................................................... 119
Figure 13.3. Non-multiplexed Configuration Example............................................ 120
Figure 13.4. EMIF Operating Modes...................................................................... 120
Figure 13.5. Non-multiplexed 16-bit MOVX Timing................................................ 124
Figure 13.6. Non-multiplexed 8-bit MOVX without Bank Select Timing ................. 125
Figure 13.7. Non-multiplexed 8-bit MOVX with Bank Select Timing ...................... 126
Figure 13.8. Multiplexed 16-bit MOVX Timing........................................................ 127
Figure 13.9. Multiplexed 8-bit MOVX without Bank Select Timing......................... 128
Figure 13.10. Multiplexed 8-bit MOVX with Bank Select Timing............................ 129
14. Oscillators
Figure 14.1. Oscillator Diagram.............................................................................. 131
15. Port Input/Output
Figure 15.1. Port I/O Functional Block Diagram (Port 0 through Port 3)................ 142
Figure 15.2. Port I/O Cell Block Diagram ............................................................... 143
Figure 15.3. Peripheral Availability on Port I/O Pins............................................... 144
Figure 15.4. Crossbar Priority Decoder in Example Configuration
(No Pins Skipped)............................................................................................. 145
Figure 15.5. Crossbar Priority Decoder in 
Example Configuration (3 Pins Skipped) .......................................................... 146
16. Universal Serial Bus Controller (USB0)
Figure 16.1. USB0 Block Diagram.......................................................................... 159
Figure 16.2. USB0 Register Access Scheme......................................................... 162
Figure 16.3. USB FIFO Allocation.......................................................................... 167
17. SMBus
Figure 17.1. SMBus Block Diagram ....................................................................... 188
Figure 17.2. Typical SMBus Configuration............................................................. 189
Figure 17.3. SMBus Transaction............................................................................ 190
Figure 17.4. Typical SMBus SCL Generation......................................................... 193
Figure 17.5. Typical Master Transmitter Sequence................................................ 199
Figure 17.6. Typical Master Receiver Sequence.................................................... 200
Figure 17.7. Typical Slave Receiver Sequence...................................................... 201
Figure 17.8. Typical Slave Transmitter Sequence.................................................. 202
18. UART0
Figure 18.1. UART0 Block Diagram....................................................................... 205
Figure 18.2. UART0 Baud Rate Logic.................................................................... 206
Figure 18.3. UART Interconnect Diagram.............................................................. 207
Figure 18.4. 8-Bit UART Timing Diagram............................................................... 207
Figure 18.5. 9-Bit UART Timing Diagram............................................................... 208
Figure 18.6. UART Multi-Processor Mode Interconnect Diagram.......................... 209
19. UART1 (C8051F340/1/4/5/8/A/B/C Only)

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Figure 19.1. UART1 Block Diagram....................................................................... 213
Figure 19.2. UART1 Timing Without Parity or Extra Bit.......................................... 215
Figure 19.3. UART1 Timing With Parity ................................................................. 215
Figure 19.4. UART1 Timing With Extra Bit............................................................. 215
Figure 19.5. Typical UART Interconnect Diagram.................................................. 216
Figure 19.6. UART Multi-Processor Mode Interconnect Diagram.......................... 218
20. Enhanced Serial Peripheral Interface (SPI0)
Figure 20.1. SPI Block Diagram............................................................................. 222
Figure 20.2. Multiple-Master Mode Connection Diagram....................................... 225
Figure 20.3. 3-Wire Single Master and Slave Mode Connection Diagram............. 225
Figure 20.4. 4-Wire Single Master Mode and Slave Mode Connection Diagram... 225
Figure 20.5. Master Mode Data/Clock Timing........................................................ 227
Figure 20.6. Slave Mode Data/Clock Timing (CKPHA = 0).................................... 228
Figure 20.7. Slave Mode Data/Clock Timing (CKPHA = 1).................................... 228
Figure 20.8. SPI Master Timing (CKPHA = 0)........................................................ 232
Figure 20.9. SPI Master Timing (CKPHA = 1)........................................................ 232
Figure 20.10. SPI Slave Timing (CKPHA = 0)........................................................ 233
Figure 20.11. SPI Slave Timing (CKPHA = 1)........................................................ 233
21. Timers
Figure 21.1. T0 Mode 0 Block Diagram.................................................................. 236
Figure 21.2. T0 Mode 2 Block Diagram.................................................................. 237
Figure 21.3. T0 Mode 3 Block Diagram.................................................................. 238
Figure 21.4. Timer 2 16-Bit Mode Block Diagram .................................................. 243
Figure 21.5. Timer 2 8-Bit Mode Block Diagram .................................................... 244
Figure 21.6. Timer 2 Capture Mode (T2SPLIT = ‘0’).............................................. 245
Figure 21.7. Timer 2 Capture Mode (T2SPLIT = ‘1’).............................................. 246
Figure 21.8. Timer 3 16-Bit Mode Block Diagram .................................................. 249
Figure 21.9. Timer 3 8-Bit Mode Block Diagram .................................................... 250
Figure 21.10. Timer 3 Capture Mode (T3SPLIT = ‘0’)............................................ 251
Figure 21.11. Timer 3 Capture Mode (T3SPLIT = ‘1’)............................................ 252
22. Programmable Counter Array (PCA0)
Figure 22.1. PCA Block Diagram............................................................................ 255
Figure 22.2. PCA Counter/Timer Block Diagram.................................................... 256
Figure 22.3. PCA Interrupt Block Diagram............................................................. 257
Figure 22.4. PCA Capture Mode Diagram.............................................................. 258
Figure 22.5. PCA Software Timer Mode Diagram.................................................. 259
Figure 22.6. PCA High Speed Output Mode Diagram............................................ 260
Figure 22.7. PCA Frequency Output Mode............................................................ 261
Figure 22.8. PCA 8-Bit PWM Mode Diagram......................................................... 262
Figure 22.9. PCA 16-Bit PWM Mode...................................................................... 263
Figure 22.10. PCA Module 4 with Watchdog Timer Enabled................................. 264
23. C2 Interface
Figure 23.1. Typical C2 Pin Sharing....................................................................... 273