Silicon Laboratories C8051F341, C8051F347, C8051F346, C8051F343

C8051F340/1/2/3/4/5/6/7

SFR Definition 14.3. OSCLCN: Internal L-F Oscillator Control

R/W	R	R/W	R	R/W	R/W	R/W	R/W
OSCLEN	OSCLRDY	OSCLF3	OSCLF2	OSCLF1	OSCLF0	OSCLD1	OSCLD0
Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0

Reset Value

00vvvv00

SFR Address:

	0x86
Bit7:	OSCLEN: Internal L-F Oscillator Enable.
	0: Internal L-F Oscillator Disabled.
	1: Internal L-F Oscillator Enabled.
Bit6:	OSCLRDY: Internal L-F Oscillator Ready Flag.
	0: Internal L-F Oscillator frequency not stabilized.
	1: Internal L-F Oscillator frequency stabilized.
Bits5–2:	OSCLF[3:0]: Internal L-F Oscillator Frequency Control bits.
	Fine-tune control bits for the internal L-F Oscillator frequency. When set to 0000b, the L-F
	oscillator operates at its fastest setting. When set to 1111b, the L-F oscillator operates at its
	slowest setting.
Bits1–0:	OSCLD[1:0]: Internal L-F Oscillator Divider Select.
	00: Divide by 8 selected.
	01: Divide by 4selected.
	10: Divide by 2 selected.
	11: Divide by 1 selected.

138

Rev. 0.5

Image 138

Silicon Laboratories C8051F341, C8051F347, C8051F346, C8051F343 SFR Definition 14.3. Osclcn Internal L-F Oscillator Control

Contents

Full Speed USB Flash MCU Family Precision Internal OscillatorsHIGH-SPEED Controller Core Rev Table Of Contents Prefetch Engine Reset Sources 101 Flash Memory 109External Data Memory Interface and On-Chip Xram 117 Universal Serial Bus Controller USB0 163 Oscillators 135Port Input/Output 147 SMBus 193 UART1 C8051F340/1/4/5 Only 219 Timers 243UART0 211 Enhanced Serial Peripheral Interface SPI0 229 Programmable Counter Array PCA0 263 23. C2 Interface 279Contact Information 282 C8051F340/1/2/3/4/5/6/7 List of Figures and Tables Absolute Maximum RatingsVoltage Reference External Data Memory Interface and On-Chip Xram Prefetch Engine Reset SourcesFlash Memory Oscillators UART1 C8051F340/1/4/5 Only SMBusUART0 Enhanced Serial Peripheral Interface SPI0 Timers Programmable Counter Array PCA023.C2 Interface List of Registers C8051F340/1/2/3/4/5/6/7 C8051F340/1/2/3/4/5/6/7 C8051F340/1/2/3/4/5/6/7 System Overview TQFP48 Product Selection GuideRAM LQFP32 C8051F340/1/4/5 Block Diagram C8051F342/3/6/7 Block Diagram Fully 8051 Compatible Additional FeaturesCIP-51 Microcontroller Core Improved Throughput On-Chip Clock and Reset On-Chip Memory On-Chip Memory Map for 64kB Devices C8051F340/2/4/6 USB Controller Block Diagram Universal Serial Bus Controller Voltage Regulator On-Chip Debug Circuitry Digital Crossbar Diagram Programmable Digital I/O and Crossbar Serial Ports Programmable Counter Array Bit ADC Block Diagram Bit Analog to Digital Converter 10. Comparator0 Block Diagram Absolute Maximum Ratings Parameter Conditions Min Typ Max UnitsGND Global DC Electrical Characteristics TBD Index to Electrical Characteristics Tables Table Title Pinout and Package Definitions Pin Definitions for the C8051F340/1/2/3/4/5/6/7Name Pin Numbers Type Description 48-pin 32-pin C8051F340/1/2/3/4/5/6/7 C8051F340/1/2/3/4/5/6/7 C8051F340/1/4/5 Top View Package Dimensions TQFP-48MIN TYP MAX LQFP-32 Pinout Diagram Top View GND VDD Regin Vbus LQFP-32 Package Diagram LQFP-32 C8051F340/1/2/3/4/5/6/7 ADC0 Functional Block Diagram Bit ADC ADC0 Analog Multiplexer Vref Temperature Sensor Temperature Sensor Transfer Function Temperature degrees C Modes of Operation Starting a Conversion Bit ADC Track and Conversion Example Timing Tracking Modes Differential Mode Single-Ended Mode Equation 5.1. ADC0 Settling Time RequirementsSettling Time Requirements AMX0P4-0 ADC0 Positive Input Pin Package SFR Definition 5.1. AMX0P AMUX0 Positive Channel SelectAMX0P4 AMX0P3 AMX0P2 AMX0P1 AMX0P0 Reserved SFR Definition 5.2. AMX0N AMUX0 Negative Channel Select AMX0N4 AMX0N3 AMX0N2 AMX0N1 AMX0N0AMX0N4-0 ADC0 Negative Input Pin Package SFR Definition 5.5. ADC0L ADC0 Data Word LSB SFR Definition 5.3. ADC0CF ADC0 ConfigurationSFR Definition 5.4. ADC0H ADC0 Data Word MSB AD0SC4 AD0SC3 AD0SC2 AD0SC1 AD0SC0 AD0LJST SFR Definition 5.6. ADC0CN ADC0 Control AD0EN AD0TM AD0INT AD0BUSY AD0WINT AD0CM2 AD0CM1 AD0CM0 Programmable Window Detector SFR Definition 5.8. ADC0GTL ADC0 Greater-Than Data Low Byte SFR Definition 5.9. ADC0LTH ADC0 Less-Than Data High Byte SFR Definition 5.10. ADC0LTL ADC0 Less-Than Data Low Byte Window Detector In Single-Ended Mode ADC Window Compare Example Right-Justified Single-Ended Data Window Detector In Differential Mode ADC Window Compare Example Right-Justified Differential Data ADC0 Electrical Characteristics Conversion RateAnalog Inputs Voltage Reference Functional Block Diagram Voltage Reference Refsl Tempe Biase Refbe Voltage Reference Electrical CharacteristicsSFR Definition 6.1. REF0CN Reference Control External Reference Refbe = Comparators Comparator Functional Block Diagram Comparator Hysteresis Plot SFR Definition 7.1. CPT0CN Comparator0 Control CP0EN CP0OUT CP0RIF CP0FIF CP0HYP1 CP0HYP0 CP0HYN1 CP0HYN0 Negative Input Pin Package SFR Definition 7.2. CPT0MX Comparator0 MUX SelectionCMX0N1 CMX0N0 CMX0P1 CMX0P0 Mode SFR Definition 7.3. CPT0MD Comparator0 Mode SelectionCP0RIE CP0FIE CP0MD1 CP0MD0 CP0MD1 CP0MD0 SFR Definition 7.4. CPT1CN Comparator1 Control CP1EN CP1OUT CP1RIF CP1FIF CMX1N2 CMX1N1 CMX1N0 SFR Definition 7.5. CPT1MX Comparator1 MUX SelectionCMX1N2 CMX1N1 CMX1N0 CMX1P2 CMX1P1 CMX1P0 CMX1P2 CMX1P1 CMX1P0 CP1MD1 CP1MD0 SFR Definition 7.6. CPT1MD Comparator1 Mode SelectionCP1RIE CP1FIE CP1MD1 CP1MD0 CP1 Response Time Comparator Electrical Characteristics Voltage Regulator REG0 Regulator Mode SelectionVoltage Regulator Electrical Specifications Vbus Detection REG0 Configuration USB Bus-Powered REG0 Configuration USB Self-Powered, Regulator Disabled SFR Definition 8.1. REG0CN Voltage Regulator Control Regdis Vbstat Vbpol Regmod CIP-51 Block Diagram CIP-51 Microcontroller Instruction Set Instruction and CPU TimingPerformance CIP-51 Instruction Set Summary Movx Instruction and Program MemoryLogical Operations Mnemonic Description Bytes Clock Cycles Data Transfer Boolean Manipulation Program Branching C8051F340/1/2/3/4/5/6/7 Memory Organization Program Memory Bit Addressable Locations Data MemoryGeneral Purpose Registers Stack Special Function Register SFR Memory Map Special Function Registers Special Function Registers Register Address DescriptionADC0L PSW REF0CN SPI0CN SFR Definition 9.3. SP Stack Pointer SFR Definition 9.1. DPL Data Pointer Low ByteSFR Definition 9.2. DPH Data Pointer High Byte Register Descriptions RS1 RS0 SFR Definition 9.4. PSW Program Status WordSFR Definition 9.5. ACC Accumulator Register Bank Address MCU Interrupt Sources and Vectors SFR Definition 9.6. B B RegisterInterrupt Handler External Interrupts IT0 IN0PL Interrupt PrioritiesInterrupt Latency IT1 IN1PL Interrupt Summary Interrupt Register Descriptions SFR Definition 9.7. IE Interrupt Enable ESPI0 ET2 ES0 ET1 EX1 ET0 EX0 SFR Definition 9.8. IP Interrupt Priority PSPI0 PT2 PS0 PT1 PX1 PT0 PX0 SFR Definition 9.9. EIE1 Extended Interrupt Enable ET3 ECP1 ECP0 EPCA0 EADC0 EWADC0 EUSB0 ESMB0 SFR Definition 9.10. EIP1 Extended Interrupt Priority PT3 PCP1 PCP0 PPCA0 PADC0 PWADC0 PUSB0 PSMB0 ES1 Evbus SFR Definition 9.11. EIE2 Extended Interrupt EnableSFR Definition 9.12. EIP2 Extended Interrupt Priority PS1 Pvbus IN1SL2-0 INT1 Port Pin SFR Definition 9.13. IT01CF INT0/INT1 ConfigurationIN1PL IN1SL2 IN1SL1 IN1SL0 IN0PL IN0SL2 IN0SL1 IN0SL0 IN0SL2-0 INT0 Port Pin Power Management Modes Idle ModeStop Mode SFR Definition 9.14. Pcon Power Control GF5 GF4 GF3 GF2 GF1 GF0 Stop Idle C8051F340/1/2/3/4/5/6/7 Prefetch Engine SFR Definition 10.1. PFE0CN Prefetch Engine ControlPfen Flbwe 100 Reset Sources Power-On Reset Power-On and VDD Monitor Reset Timing Power-Fail Reset / VDD Monitor SFR Definition 11.1. VDM0CN VDD Monitor ControlVdmen Comparator0 Reset External ResetMissing Clock Detector Reset PCA Watchdog Timer Reset Software Reset USB Reset SFR Definition 11.2. Rstsrc Reset Source Usbrsf Ferror C0RSEF Swrsf Wdtrsf Mcdrsf Porsf Pinrsf Reset Electrical Characteristics 108 Programming The Flash Memory Flash Erase ProcedureFlash Memory Flash Lock and Key Functions Flash Write Procedure Flash Electrical Characteristics Non-volatile Data StorageSecurity Options Flash Program Memory Map and Security Byte Accessing Flash from the C2 debug interface SFR Definition 12.1. Psctl Program Store R/W Control SFR Definition 12.2. Flkey Flash Lock and KeyPswe SFR Definition 12.3. Flscl Flash Scale FoseFlrt 116 Accessing Xram External Data Memory Interface and On-Chip XramBit Movx Example Accessing USB Fifo Space USB Fifo Space Configuring the External Memory Interface Port Configuration PGSEL7 PGSEL6 PGSEL5 PGSEL4 PGSEL3 PGSEL2 PGSEL1 PGSEL0 SFR Definition 13.2. EMI0CF External Memory Configuration Usbfae EMD2 EMD1 EMD0 EALE1 EALE0 Multiplexed Configuration Multiplexed and Non-multiplexed Selection Non-multiplexed Configuration Example Memory Mode Selection Non-multiplexed Configuration Split Mode without Bank Select Internal Xram Only Split Mode with Bank Select TimingExternal Only SFR Definition 13.3. EMI0TC External Memory Timing Control EAS1 EAS0 ERW3 EWR2 EWR1 EWR0 EAH1 EAH0 Emif Write Data Non-multiplexed ModeBit Movx EMI0CF42 = ‘101’, ‘110’, or ‘111’ Emif Read Data Non-multiplexed 8-bit Movx without Bank Select Timing Bit Movx without Bank Select EMI0CF42 = ‘101’ or ‘111’ Non-multiplexed 8-bit Movx with Bank Select Timing Bit Movx with Bank Select EMI0CF42 = ‘110’ Multiplexed Mode Bit Movx EMI0CF42 = ‘001’, ‘010’, or ‘011’ Multiplexed 8-bit Movx without Bank Select Timing Bit Movx without Bank Select EMI0CF42 = ‘001’ or ‘011’ 10. Multiplexed 8-bit Movx with Bank Select Timing Bit Movx with Bank Select EMI0CF42 = ‘010’ AC Parameters for External Memory Interface Parameter Description Min Max Units 134 Oscillator Diagram Oscillators SFR Definition 14.1. Oscicn Internal H-F Oscillator Control Internal H-F Oscillator Suspend ModeProgrammable Internal High-Frequency H-F Oscillator Ioscen Ifrdy Suspend IFCN1 IFCN0 Programmable Internal Low-Frequency L-F Oscillator Calibrating the Internal L-F OscillatorOsccal SFR Definition 14.3. Osclcn Internal L-F Oscillator Control Osclen Osclrdy OSCLF3 OSCLF2 OSCLF1 OSCLF0 OSCLD1 OSCLD0 Clocking Timers Directly Through the External Oscillator External Oscillator Drive CircuitExternal Crystal Example External RC Example External Capacitor Example SFR Definition 14.4. Oscxcn External Oscillator Control Xtlvld XOSCMD2 XOSCMD1 XOSCMD0 XFCN2 XFCN1 XFCN0Xfcn Mulen Mulinit Mulrdy Mulsel Clock MultiplierSFR Definition 14.5. Clkmul Clock Multiplier Control Mulsel System and USB Clock Selection External Oscillator Clock SignalInternal Oscillator Clock Signal System Clock Selection Usbclk SFR Definition 14.6. Clksel Clock SelectUsbclk Clksl Clksl Oscillator Electrical Characteristics External USB Clock Requirements 146 Port I/O Functional Block Diagram Port 0 through Port Port Input/Output Port I/O Cell Block Diagram Crossbar Priority Decoder with No Pins Skipped Priority Crossbar Decoder Crossbar Priority Decoder with Crystal Pins Skipped Port I/O Initialization SFR Definition 15.1. XBR0 Port I/O Crossbar Register CP1AE CP1E CP0AE CP0E Syscke SMB0E SPI0E URT0E Weakpud Xbare T1E T0E Ecie PCA0ME SFR Definition 15.2. XBR1 Port I/O Crossbar RegisterSFR Definition 15.3. XBR2 Port I/O Crossbar Register URT1E SFR Definition 15.5. P0MDIN Port0 Input Mode General Purpose Port I/OSFR Definition 15.4. P0 Port0 Latch SFR Definition 15.6. P0MDOUT Port0 Output Mode SFR Definition 15.7. P0SKIP Port0 Skip SFR Definition 15.9. P1MDIN Port1 Input Mode SFR Definition 15.10. P1MDOUT Port1 Output ModeSFR Definition 15.8. P1 Port1 Latch SFR Definition 15.13. P2MDIN Port2 Input Mode SFR Definition 15.11. P1SKIP Port1 SkipSFR Definition 15.12. P2 Port2 Latch SFR Definition 15.14. P2MDOUT Port2 Output Mode SFR Definition 15.15. P2SKIP Port2 Skip SFR Definition 15.17. P3MDIN Port3 Input Mode SFR Definition 15.18. P3MDOUT Port3 Output ModeSFR Definition 15.16. P3 Port3 Latch SFR Definition 15.19. P3SKIP Port3 Skip SFR Definition 15.20. P4 Port4 Latch SFR Definition 15.21. P4MDIN Port4 Input Mode SFR Definition 15.22. P4MDOUT Port4 Output Mode Port I/O DC Electrical Characteristics USB0 Block Diagram Universal Serial Bus Controller USB0 USB Transceiver Endpoint AddressingEndpoint Addressing Scheme Endpoint Associated Pipes USB Protocol Address SFR Definition 16.1. USB0XCN USB0 Transceiver Control Pren Phyen Speed PHYTST1 PHYTST0 DfrecPHYTST10 USB Register Access USB0 Register Access Scheme SFR Definition 16.2. USB0ADR USB0 Indirect Address Busy Autord Usbaddr SFR Definition 16.3. USB0DAT USB0 Data USB0 Controller Registers USB Register Definition 16.4. Index USB0 Endpoint IndexIndex Communication Speed USB Clock 4x Clock Multiplier Input USB Clock ConfigurationUSB Register Definition 16.5. Clkrec Clock Recovery Control CRE Crssen Crlow Fifo Split Mode Fifo Management Fifo Double Buffering Fifo ConfigurationsFifo Access Fifodata Function Configuration and Control Function AddressingUSB Register Definition 16.7. Faddr USB0 Function Address 174 USB Register Definition 16.8. Power USB0 Power Isoud Usbinh Usbrst Resume Susmd Susen USB Register Definition 16.9. Framel USB0 Frame Number Low Interrupts IN3 IN2 IN1 EP0 OUT3 OUT2 OUT1 USB Register Definition 16.13. Cmint USB0 Common Interrupt SOF Rstint Rsuint Susint IN3E IN2E IN1E EP0E OUT3E OUT2E OUT1E Serial Interface Engine Endpoint0Sofe Rstinte Rsuinte Susinte Endpoint0 Setup Transactions Endpoint0 in Transactions Endpoint0 OUT Transactions USB Register Definition 16.17. E0CSR USB0 Endpoint0 Control Ssuend Soprdy Sdstl Suend Dataend Ststl Inprdy OprdySsuend Configuring Endpoints1-3 Endpoints1-3 in Interrupt or Bulk ModeControlling Endpoints1-3 Endpoints1-3 in Isochronous Mode Clrdt Ststl Sdstl Flush Undrun Fifone Inprdy A packet being transmitted Endpoints1-3 OUT Interrupt or Bulk Mode Controlling Endpoints1-3 OUTDbien ISO Dirsel Fcdt Split Endpoints1-3 OUT Isochronous Mode Clrdt Ststl Sdstl Flush Daterr Ovrun Fifoful Oprdy Dboen ISO EoclE0CH USB Transceiver Electrical Characteristics Receiver 192 SMBus Block Diagram SMBus SMBus Configuration Supporting Documents SMBus Transaction Arbitration SCL High SMBus Free Timeout Using the SMBusSCL Low Timeout Clock Low Extension Tion Register on Equation 17.1. Minimum SCL High and Low Times SMBus Configuration RegisterSMBus Clock Source Selection Equation 17.2. Typical SMBus Bit Rate Minimum SDA Setup and Hold Times Minimum SDA Setup Time Minimum SDA Hold TimeExthold SFR Definition 17.1. SMB0CF SMBus Clock/Configuration Ensmb INH Busy Exthold Smbtoe Smbfte SMBCS1 SMBCS0 SMB0CN Control Register SFR Definition 17.2. SMB0CN SMBus Control Master Txmode STA STO Ackrq Arblost ACK Bit Set by Hardware When Cleared by Hardware When Sources for Hardware Changes to SMB0CN SMBus Transfer Modes Master Transmitter ModeSFR Definition 17.3. SMB0DAT SMBus Data Data Register Typical Master Transmitter Sequence Master Receiver Mode Typical Master Receiver Sequence Slave Receiver Mode Typical Slave Receiver Sequence Slave Transmitter Mode Typical Slave Transmitter Sequence SMBus Status Decoding Values Read Current SMbus State Typical Response OptionsStart Slave byte was transmitted No action required expect UART0 Block Diagram UART0 Enhanced Baud Rate Generation Equation 18.1. UART0 Baud RateOperational Modes Uart Interconnect Diagram Bit Uart Bit Uart Timing Diagram Multiprocessor Communications Master Slave Device SFR Definition 18.1. SCON0 Serial Port 0 Control S0MODE MCE0 REN0TI0 RI0 SFR Definition 18.2. SBUF0 Serial UART0 Port Data Buffer SCA1-SCA0 Target Actual Baud Oscillator Timer ClockT1M Timer Baud Rate Error Divide Source Pre-scale Rate bps Factor Select UART1 Block Diagram UART1 C8051F340/1/4/5 Only Equation 19.1. UART1 Baud Rate Baud Rate Generator Settings for Standard Baud RatesBaud Rate Generator SBRLH1SBRLL1 Data Format UART1 Timing Without Parity or Extra Bit Configuration and Operation Data TransmissionData Reception Multiprocessor Communications SFR Definition 19.1. SCON1 UART1 Control OVR1 PERR1 THRE1 REN1 TBX1 RBX1 TI1 RI1Fifo SFR Definition 19.2. SMOD1 UART1 Mode MCE1 S1PT1 S1PT0 PE1 S1DL1 S1DL0 XBE1 SBL1 SFR Definition 19.3. SBUF1 UART1 Data Buffer SB1RUNSB1PS1 SB1PS0 Rev 227 228 SPI Block Diagram Enhanced Serial Peripheral Interface SPI0 Master In, Slave Out Miso Signal DescriptionsMaster Out, Slave In Mosi Serial Clock SCK SPI0 Master Mode Operation Multiple-Master Mode Connection Diagram SPI0 Slave Mode Operation SPI0 Interrupt Sources Master Mode Data/Clock Timing Serial Clock Timing Slave Mode Data/Clock Timing Ckpha = SFR Definition 20.1. SPI0CFG SPI0 Configuration SPI Special Function RegistersSpibsy Msten Ckpha Ckpol Slvsel Nssin Srmt Rxbmt SFR Definition 20.2. SPI0CN SPI0 Control Spif Wcol Modf Rxovrn NSSMD1 NSSMD0 Txbmt Spien SFR Definition 20.3. SPI0CKR SPI0 Clock Rate SFR Definition 20.4. SPI0DAT SPI0 DataSCR7 SCR6 SCR5 SCR4 SCR3 SCR2 SCR1 SPI Master Timing Ckpha = 10. SPI Slave Timing Ckpha = Slave Mode Timing* See Figure SPI Slave Timing ParametersOnly 242 Mode 0 13-bit Counter/Timer TimersTimer 0 and Timer Timer 0 and Timer 1 Modes Timer 2 Modes Timer 3 Modes Mode 1 16-bit Counter/Timer Counter/TimerTR0 GATE0 INT0 T0 Mode 2 Block Diagram Mode 2 8-bit Counter/Timer with Auto-Reload T0 Mode 3 Block Diagram Mode 3 Two 8-bit Counter/Timers Timer 0 Only SFR Definition 21.1. Tcon Timer Control TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 GATE0 SFR Definition 21.2. Tmod Timer ModeGATE1 T1M1 T1M0 SCA1 SCA0 SFR Definition 21.3. Ckcon Clock ControlT3MH T3ML T2MH T2ML T1M T0M SCA1 SCA0 Prescaled Clock SFR Definition 21.6. TH0 Timer 0 High Byte SFR Definition 21.4. TL0 Timer 0 Low ByteSFR Definition 21.5. TL1 Timer 1 Low Byte SFR Definition 21.7. TH1 Timer 1 High Byte Timer Bit Timer with Auto-Reload TMR2H Clock Source Bit Timers with Auto-ReloadT2MH T2XCLK T2ML T2XCLK Timer 2 Capture Mode T2SPLIT = ‘0’ Timer 2 Capture Mode T2SPLIT = ‘1’ SFR Definition 21.8. TMR2CN Timer 2 Control TF2H TF2L TF2LEN T2CE T2SPLIT TR2 T2CSS T2XCLK SFR Definition 21.11. TMR2L Timer 2 Low Byte SFR Definition 21.12. TMR2H Timer 2 High Byte Timer 3 16-Bit Mode Block Diagram T3ML T3XCLK T3MH T3XCLKTMR3H Clock Source TMR3L Clock Source 10. Timer 3 Capture Mode T3SPLIT = ‘0’ USB Start-of-Frame Capture 11. Timer 3 Capture Mode T3SPLIT = ‘1’ SFR Definition 21.13. TMR3CN Timer 3 Control TF3H TF3L TF3LEN T3CE T3SPLIT TR3 T3CSS T3XCLK SFR Definition 21.16. TMR3L Timer 3 Low Byte SFR Definition 21.17. TMR3H Timer 3 High Byte Programmable Counter Array PCA0 CPS2 CPS1 CPS0 PCA Counter/TimerPCA Timebase Input Options Timebase Capture/Compare Modules PCA0CPM Register Settings for PCA Capture/Compare ModulesOperation Mode PWM16 Ecom Capp Capn MAT TOG Eccf PCA Capture Mode Diagram Edge-triggered Capture Mode PCA Software Timer Mode Diagram Software Timer Compare Mode PCA High Speed Output Mode Diagram High Speed Output Mode Frequency Output Mode Equation 22.1. Square Wave Frequency Output Bit Pulse Width Modulator Mode Equation 22.2 -Bit PWM Duty Cycle PCA 16-Bit PWM Mode Equation 22.3 -Bit PWM Duty Cycle Watchdog Timer Mode Watchdog Timer Operation Watchdog Timer Usage Equation 22.4. Watchdog Timer Offset in PCA ClocksWatchdog Timer Timeout Intervals1 PCA0CPL4 Register Descriptions for PCA SFR Definition 22.1. PCA0CN PCA ControlCCF4 CCF3 CCF2 CCF1 CCF0 SFR Definition 22.2. PCA0MD PCA Mode Cidl Wdte Wdlck CPS2 CPS1 CPS0 ECF SFR Definition 22.3. PCA0CPMn PCA Capture/Compare Mode SFR Definition 22.4. PCA0L PCA Counter/Timer Low Byte SFR Definition 22.5. PCA0H PCA Counter/Timer High ByteSFR Definition 22.6. PCA0CPLn PCA Capture Module Low Byte SFR Definition 22.7. PCA0CPHn PCA Capture Module High Byte C2 Register Definition 23.1. C2ADD C2 Address 23. C2 Interface23.1. C2 Interface Registers C2 Register Definition 23.2. Deviceid C2 Device ID Code Command C2 Register Definition 23.3. Revid C2 Revision ID 23.2. C2 Pin Sharing Typical C2 Pin Sharing Contact Information