PIC16LC62B-04I/SO 查看數據表（PDF） - Microchip Technology

零件编号

产品描述 (功能)

生产厂家

PIC16LC62B-04I/SO

28-Pin 8-Bit CMOS Microcontrollers

Microchip Technology 

3.3 PORTC and the TRISC Register

PORTC is an 8-bit wide bi-directional port. The corre-

sponding data direction register is TRISC. Setting a

TRISC bit (=1) will make the corresponding PORTC pin

an input, (i.e., put the corresponding output driver in a

hi-impedance mode). Clearing a TRISC bit (=0) will

make the corresponding PORTC pin an output, (i.e.,

put the contents of the output latch on the selected pin).

PORTC is multiplexed with several peripheral functions

(Table 3-5). PORTC pins have Schmitt Trigger input

buffers.

When enabling peripheral functions, care should be

taken in defining TRIS bits for each PORTC pin. Some

peripherals override the TRIS bit to make a pin an out-

put, while other peripherals override the TRIS bit to

make a pin an input. Since the TRIS bit override maybe

in effect while the peripheral is enabled, read-modify-

write instructions (BSF, BCF, XORWF) with TRISC as

destination should be avoided. The user should refer to

the corresponding peripheral section for the correct

TRIS bit settings.

FIGURE 3-5:

PORTC BLOCK DIAGRAM

(PERIPHERAL OUTPUT

OVERRIDE)

PORT/PERIPHERAL Select(2)

Peripheral Data Out

0

Data Bus D Q

WR

1

PORT

CK Q

Data Latch

WR

TRIS

DQ

CK Q

TRIS Latch

RD TRIS

Peripheral

OE(3)

Q

VDD

P

I/O

pin(1)

N

VSS

Schmitt

Trigger

D

RD

EN

PORT

Peripheral input

Note 1:

2:

3:

I/O pins have diode protection to VDD and VSS.

Port/Peripheral select signal selects between port

data and peripheral output.

Peripheral OE (output enable) is only activated if

peripheral select is active.

PIC16C62B/72A

© 1999 Microchip Technology Inc.

Preliminary

DS35008B-page 23

Share Link: