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PIC16F84A Datasheet(PDF) 14 Page - Microchip Technology |
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PIC16F84A Datasheet(HTML) 14 Page - Microchip Technology |
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14 / 124 page  PIC16F8X DS30430C-page 14 © 1998 Microchip Technology Inc. TABLE 4-1 REGISTER FILE SUMMARY Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Power-on Reset Value on all other resets (Note3) Bank 0 00h INDF Uses contents of FSR to address data memory (not a physical register) ---- ---- ---- ---- 01h TMR0 8-bit real-time clock/counter xxxx xxxx uuuu uuuu 02h PCL Low order 8 bits of the Program Counter (PC) 0000 0000 0000 0000 03h STATUS (2) IRP RP1 RP0 TO PD Z DC C 0001 1xxx 000q quuu 04h FSR Indirect data memory address pointer 0 xxxx xxxx uuuu uuuu 05h PORTA — — — RA4/T0CKI RA3 RA2 RA1 RA0 ---x xxxx ---u uuuu 06h PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0/INT xxxx xxxx uuuu uuuu 07h Unimplemented location, read as '0' ---- ---- ---- ---- 08h EEDATA EEPROM data register xxxx xxxx uuuu uuuu 09h EEADR EEPROM address register xxxx xxxx uuuu uuuu 0Ah PCLATH — — — Write buffer for upper 5 bits of the PC (1) ---0 0000 ---0 0000 0Bh INTCON GIE EEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u Bank 1 80h INDF Uses contents of FSR to address data memory (not a physical register) ---- ---- ---- ---- 81h OPTION_ REG RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111 82h PCL Low order 8 bits of Program Counter (PC) 0000 0000 0000 0000 83h STATUS (2) IRP RP1 RP0 TO PD Z DC C 0001 1xxx 000q quuu 84h FSR Indirect data memory address pointer 0 xxxx xxxx uuuu uuuu 85h TRISA — — — PORTA data direction register ---1 1111 ---1 1111 86h TRISB PORTB data direction register 1111 1111 1111 1111 87h Unimplemented location, read as '0' ---- ---- ---- ---- 88h EECON1 — — — EEIF WRERR WREN WR RD ---0 x000 ---0 q000 89h EECON2 EEPROM control register 2 (not a physical register) ---- ---- ---- ---- 0Ah PCLATH — — — Write buffer for upper 5 bits of the PC (1) ---0 0000 ---0 0000 0Bh INTCON GIE EEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u Legend: x = unknown, u = unchanged. - = unimplemented read as '0', q = value depends on condition. Note 1: The upper byte of the program counter is not directly accessible. PCLATH is a slave register for PC<12:8>. The contents of PCLATH can be transferred to the upper byte of the program counter, but the contents of PC<12:8> is never trans- ferred to PCLATH. 2: The TO and PD status bits in the STATUS register are not affected by a MCLR reset. 3: Other (non power-up) resets include: external reset through MCLR and the Watchdog Timer Reset. |
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