PIC16C765SLASHP datasheet(37/158 Pages) MICROCHIP

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Advanced Information

DS41124A-page 37

PIC16C745/765

5.4

PORTD and TRISD Registers

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

ers. Each pin is individually configured as an input or

output.

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.

FIGURE 5-6:

PORTD BLOCK DIAGRAM

TABLE 5-7:

PORTD FUNCTIONS

TABLE 5-8:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTD

Note:

The PIC16C745 does not provide PORTD.

The PORTD and TRISD registers are

reserved. Always maintain these bits clear.

Data

Bus

PORT

TRIS

RD PORT

Data Latch

TRIS Latch

RD TRIS

Schmitt

Trigger

Input

Buffer

I/O pin

VDD

Name

Function

Input

Type

Output

Type

Description

RD0/PSP0

RD0

TTL

CMOS

Bi-directional I/O(1)

PSP0

TTL

—

Parallel Slave Port data input(1)

RD1/PSP1

RD1

TTL

CMOS

Bi-directional I/O(1)

PSP1

TTL

—

Parallel Slave Port data input(1)

RD2/PSP2

RD2

TTL

CMOS

Bi-directional I/O(1)

PSP2

TTL

—

Parallel Slave Port data input(1)

RD3/PSP3

RD3

TTL

CMOS

Bi-directional I/O(1)

PSP3

TTL

—

Parallel Slave Port data input(1)

RD4/PSP4

RD4

TTL

CMOS

Bi-directional I/O(1)

PSP4

TTL

—

Parallel Slave Port data input(1)

RD5/PSP5

RD5

TTL

CMOS

Bi-directional I/O(1)

PSP5

TTL

—

Parallel Slave Port data input(1)

RD6/PSP6

RD6

TTL

CMOS

Bi-directional I/O(1)

PSP6

TTL

—

Parallel Slave Port data input(1)

RD7/PSP7

RD7

TTL

CMOS

Bi-directional I/O(1)

PSP7

TTL

—

Parallel Slave Port data input(1)

Legend:

OD = open drain, ST = Schmitt Trigger

Note 1:

PIC16C765 only.

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(1)

RD7

RD6

RD5

RD4

RD3

RD2

RD1

RD0

xxxx xxxx

uuuu uuuu

88h

TRISD(1)

PORTD Data Direction Register

1111 1111

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

Note 1:

PIC16C765 only.

PIC16C765/P Datasheet(PDF) 37 Page - Microchip Technology

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