Datasheet



1996 Microchip Technology Inc. DS30412C-page 61

PIC17C4X

TABLE 9-7: PORTD FUNCTIONS

TABLE 9-8: REGISTERS/BITS ASSOCIATED WITH PORTD

Name Bit Buffer Type Function

RD0/AD8 bit0 TTL Input/Output or system bus address/data pin.

RD1/AD9 bit1 TTL Input/Output or system bus address/data pin.

RD2/AD10 bit2 TTL Input/Output or system bus address/data pin.

RD3/AD11 bit3 TTL Input/Output or system bus address/data pin.

RD4/AD12 bit4 TTL Input/Output or system bus address/data pin.

RD5/AD13 bit5 TTL Input/Output or system bus address/data pin.

RD6/AD14 bit6 TTL Input/Output or system bus address/data pin.

RD7/AD15 bit7 TTL Input/Output or system bus address/data pin.

Legend: TTL = TTL input.

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

(Note1)

13h, Bank 1 PORTD

RD7/

AD15

RD6/

AD14

RD5/

AD13

RD4/

AD12

RD3/

AD11

RD2/

AD10

RD1/

AD9

RD0/

AD8

xxxx xxxx uuuu uuuu

12h, Bank 1 DDRD Data direction register for PORTD

1111 1111 1111 1111

Legend:

= unknown,

= unchanged.

Note 1: Other (non power-up) resets include: external reset through MCLR

and the Watchdog Timer Reset.