PIC16LC72AT-20I/JW 查看數據表（PDF） - Microchip Technology

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PIC16LC72AT-20I/JW

28-Pin 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62B/72A

TABLE 3-1 PORTA FUNCTIONS

Name

Bit# Buffer Function

RA0/AN0

bit0

TTL

Input/output or analog input(1)

RA1/AN1

bit1

TTL

Input/output or analog input(1)

RA2/AN2

bit2

TTL

Input/output or analog input(1)

RA3/AN3/VREF bit3

TTL

Input/output or analog input(1) or VREF(1)

RA4/T0CKI

bit4

ST

Input/output or external clock input for Timer0

Output is open drain type

RA5/SS/AN4 bit5

TTL

Input/output or slave select input for synchronous serial port or analog input(1)

Legend: TTL = TTL input, ST = Schmitt Trigger input

Note 1: The PIC16C62B does not implement the A/D module.

TABLE 3-2 SUMMARY OF REGISTERS ASSOCIATED WITH PORTA

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

05h

PORTA

— — RA5 RA4 RA3 RA2 RA1 RA0 --0x 0000 --0u 0000

(for PIC16C72A only)

05h

PORTA

— — RA5 RA4 RA3 RA2 RA1 RA0 --xx xxxx --uu uuuu

(for PIC16C62B only)

85h

TRISA

— — PORTA Data Direction Register

--11 1111 --11 1111

9Fh

ADCON1(1)

—

—

—

—

— PCFG2 PCFG1 PCFG0 ---- -000 ---- -000

Legend: x = unknown, u = unchanged, - = unimplemented locations read as ’0’. Shaded cells are not used by PORTA.

Note 1: The PIC16C62B does not implement the A/D module. Maintain this register clear.

DS35008B-page 20

Preliminary

© 1999 Microchip Technology Inc.

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