PIC16LC64-10E/TQ View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC64-10E/TQ

8-Bit CMOS Microcontrollers

Microchip Technology 

5.4 PORTD and TRISD Register

Applicable Devices

61 62 62A R62 63 R63 64 64A R64 65 65A R65 66 67

PORTD is an 8-bit port with Schmitt Trigger input buff-

ers. Each pin is individually configurable as input or out-

put.

PORTD can be configured as an 8-bit wide micropro-

cessor port (parallel slave port) by setting control bit

PSPMODE (TRISE<4>). In this mode, the input buffers

are TTL.

PIC16C6X

FIGURE 5-7: PORTD BLOCK DIAGRAM

(IN I/O PORT MODE)

Data

bus

WR

PORT

D

Q

CK

I/O pin(1)

WR

TRIS

Data Latch

DQ

CK

TRIS Latch

Schmitt

Trigger

input

buffer

RD TRIS

Q

D

RD PORT

ENEN

Note 1: I/O pins have protection diodes to VDD and VSS.

TABLE 5-9: PORTD FUNCTIONS

Name

Bit#

RD0/PSP0

bit0

RD1/PSP1

bit1

RD2/PSP2

bit2

RD3/PSP3

bit3

RD4/PSP4

bit4

RD5/PSP5

bit5

RD6/PSP6

bit6

RD7/PSP7

bit7

Buffer Type

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

ST/TTL(1)

Function

Input/output port pin or parallel slave port bit0

Input/output port pin or parallel slave port bit1

Input/output port pin or parallel slave port bit2

Input/output port pin or parallel slave port bit3

Input/output port pin or parallel slave port bit4

Input/output port pin or parallel slave port bit5

Input/output port pin or parallel slave port bit6

Input/output port pin or parallel slave port bit7

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

Note 1: Buffer is a Schmitt Trigger when in I/O mode, and a TTL buffer when in Parallel Slave Port mode.

TABLE 5-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTD

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

08h

PORTD RD7 RD6 RD5

RD4

RD3 RD2 RD1 RD0 xxxx xxxx uuuu uuuu

88h

TRISD PORTD Data Direction Register

1111 1111 1111 1111

89h

TRISE

IBF

OBF IBOV PSPMODE — PORTE Data Direction Bits

0000 -111 0000 -111

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

© 1997 Microchip Technology Inc.

DS30234D-page 57

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