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PIC16F870/P Datasheet(PDF) 15 Page - Microchip Technology |
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PIC16F870/P Datasheet(HTML) 15 Page - Microchip Technology |
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15 / 156 page  © 1999 Microchip Technology Inc. Preliminary DS30569A-page 15 PIC16F870/871 Bank 2 100h(4) INDF Addressing this location uses contents of FSR to address data memory (not a physical register) 0000 0000 0000 0000 101h TMR0 Timer0 module’s register xxxx xxxx uuuu uuuu 102h(4) PCL Program Counter's (PC) Least Significant Byte 0000 0000 0000 0000 103h(4) STATUS IRP RP1 RP0 TO PD Z DC C 0001 1xxx 000q quuu 104h(4) FSR Indirect data memory address pointer xxxx xxxx uuuu uuuu 105h — Unimplemented — — 106h PORTB PORTB Data Latch when written: PORTB pins when read xxxx xxxx uuuu uuuu 107h — Unimplemented — — 108h — Unimplemented — — 109h — Unimplemented — — 10Ah(1,4) PCLATH — — — Write Buffer for the upper 5 bits of the Program Counter ---0 0000 ---0 0000 10Bh(4) INTCON GIE PEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u 10Ch EEDATA EEPROM data register xxxx xxxx uuuu uuuu 10Dh EEADR EEPROM address register xxxx xxxx uuuu uuuu 10Eh EEDATH — — EEPROM data register high byte xxxx xxxx uuuu uuuu 10Fh EEADRH — — — EEPROM address register high byte xxxx xxxx uuuu uuuu Bank 3 180h(4) INDF Addressing this location uses contents of FSR to address data memory (not a physical register) 0000 0000 0000 0000 181h OPTION_REG RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111 182h(4) PCL Program Counter's (PC) Least Significant Byte 0000 0000 0000 0000 183h(4) STATUS IRP RP1 RP0 TO PD Z DC C 0001 1xxx 000q quuu 184h(4) FSR Indirect data memory address pointer xxxx xxxx uuuu uuuu 185h — Unimplemented — — 186h TRISB PORTB Data Direction Register 1111 1111 1111 1111 187h — Unimplemented — — 188h — Unimplemented — — 189h — Unimplemented — — 18Ah(1,4) PCLATH — — — Write Buffer for the upper 5 bits of the Program Counter ---0 0000 ---0 0000 18Bh(4) INTCON GIE PEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u 18Ch EECON1 EEPGD — — — WRERR WREN WR RD x--- x000 x--- u000 18Dh EECON2 EEPROM control register2 (not a physical register) ---- ---- ---- ---- 18Eh — Reserved maintain clear 0000 0000 0000 0000 18Fh — Reserved maintain clear 0000 0000 0000 0000 TABLE 2-1: SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED) Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on: POR, BOR Value on all other resets (2) Legend: x = unknown, u = unchanged, q = value depends on condition, - = unimplemented read as ’0’, r = reserved. Shaded locations are unimplemented, read as ‘0’. Note 1: The upper byte of the program counter is not directly accessible. PCLATH is a holding register for the PC<12:8> whose contents are transferred to the upper byte of the program counter. 2: Other (non power-up) resets include external reset through MCLR and Watchdog Timer Reset. 3: Bits PSPIE and PSPIF are reserved on the 28-pin devices; always maintain these bits clear. 4: These registers can be addressed from any bank. 5: PORTD, PORTE, TRISD and TRISE are not physically implemented on the 28-pin devices, read as ‘0’. |
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