Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 20 8-Bit 20 MHz I/O number 11

PIC12F635/PIC16F636/639

TABLE 2-3: PIC16F636/639 SPECIAL FUNCTION REGISTERS SUMMARY BANK 0

Addr Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Value on

POR/BOR/

WUR

Page

Bank 0

00h INDF Addressing this location uses contents of FSR to address data memory

(not a physical register)

xxxx xxxx

32,137

01h TMR0 Timer0 Module Register xxxx xxxx

61,137

02h PCL Program Counter’s (PC) Least Significant Byte 0000 0000

32,137

03h STATUS IRP RP1 RP0 TO PD ZDCC0001 1xxx

26,137

04h FSR Indirect Data Memory Address Pointer xxxx xxxx

32,137

05h PORTA — — RA5 RA4 RA3 RA2 RA1 RA0 --xx xx00 48,137

06h — Unimplemented — —

07h PORTC

— — RC5 RC4 RC3 RC2 RC1 RC0 --xx xx00 57,137

08h — Unimplemented — —

09h — Unimplemented — —

0Ah PCLATH

— — — Write Buffer for upper 5 bits of Program Counter ---0 0000

32,137

0Bh INTCON GIE PEIE T0IE INTE RAIE T0IF INTF RAIF

(2)

0000 000x

28,137

0Ch PIR1 EEIF LVDIF CRIF C2IF C1IF OSFIF —TMR1IF0000 00-0

30,137

0Dh — Unimplemented — —

0Eh TMR1L Holding Register for the Least Significant Byte of the 16-bit TMR1 xxxx xxxx

64,137

0Fh TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 xxxx xxxx

64,137

10h T1CON T1GINV TMR1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON 0000 0000

68,137

11h — Unimplemented — —

12h — Unimplemented — —

13h — Unimplemented — —

14h — Unimplemented — —

15h — Unimplemented — —

16h — Unimplemented — —

17h — Unimplemented — —

18h WDTCON

— — — WDTPS3 WDTPS2 WDTPS1 WDTPS0 SWDTEN ---0 1000

144,137

19h CMCON0 C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0 0000 0000

79,137

1Ah CMCON1 — — — — — — T1GSS C2SYNC ---- --10

82,137

1Bh — Unimplemented — —

1Ch — Unimplemented — —

1Dh — Unimplemented — —

1Eh — Unimplemented — —

1Fh — Unimplemented — —

Legend: – = Unimplemented locations read as ‘0’, u = unchanged, x = unknown, q = value depends on condition,

shaded = unimplemented

Note 1: Other (non Power-up) Resets include MCLR

Reset and Watchdog Timer Reset during normal operation.

2: MCLR

and WDT Reset do not affect the previous value data latch. The RAIF bit will be cleared upon Reset but will set

again if the mismatch exists.