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PIC16LC554 Datasheet(PDF) 16 Page - Microchip Technology |
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PIC16LC554 Datasheet(HTML) 16 Page - Microchip Technology |
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16 / 96 page  PIC16C55X(A) DS40143B-page 16 Preliminary © 1997 Microchip Technology Inc. 4.2.2 SPECIAL FUNCTION REGISTERS The special function registers are registers used by the CPU and Peripheral functions for controlling the desired operation of the device (Table 4-1). These registers are static RAM. The special function registers can be classified into two sets (core and peripheral). The special function regis- ters associated with the “core” functions are described in this section. Those related to the operation of the peripheral features are described in the section of that peripheral feature. TABLE 4-1: SPECIAL REGISTERS FOR THE PIC16C55X(A) Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR Reset Value on all other resets(1) Bank 0 00h INDF Addressing this location uses contents of FSR to address data memory (not a physical register) xxxx xxxx xxxx xxxx 01h TMR0 Timer0 Module’s Register xxxx xxxx uuuu uuuu 02h PCL Program Counter's (PC) Least Significant Byte 0000 0000 0000 0000 03h STATUS IRP(2) RP1(2) RP0 TO PD Z DC C 0001 1xxx 000q quuu 04h FSR Indirect data memory address pointer xxxx xxxx uuuu uuuu 05h PORTA — — — RA4 RA3 RA2 RA1 RA0 ---x xxxx ---u uuuu 06h PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx uuuu uuuu 07h Unimplemented — — 08h Unimplemented — — 09h Unimplemented — — 0Ah PCLATH — — — Write buffer for upper 5 bits of program counter ---0 0000 ---0 0000 0Bh INTCON GIE (3) T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000x 0Ch Unimplemented — — 0Dh-1Eh Unimplemented — — 1Fh Unimplemented — — Bank 1 80h INDF Addressing this location uses contents of FSR to address data memory (not a physical register) xxxx xxxx xxxx xxxx 81h OPTION RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111 82h PCL Program Counter's (PC) Least Significant Byte 0000 0000 0000 0000 83h STATUS — — RP0 TO PD Z DC C 0001 1xxx 000q quuu 84h FSR Indirect data memory address pointer xxxx xxxx uuuu uuuu 85h TRISA — — — TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 ---1 1111 ---1 1111 86h TRISB TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 1111 1111 1111 1111 87h Unimplemented — — 88h Unimplemented — — 89h Unimplemented — — 8Ah PCLATH — — — Write buffer for upper 5 bits of program counter ---0 0000 ---0 0000 8Bh INTCON GIE (3) T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000x 8Ch Unimplemented — — 8Dh Unimplemented — — 8Eh PCON — — — — — — POR — ---- --0- ---- --u- 8Fh-9Eh Unimplemented — — 9Fh 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. Note 2: IRP & RPI bits are reserved, always maintain these bits clear. Note 3: Bit 6 of INTCON register is reserved for future use. Always maintain this bit as clear. |
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