PIC16C641 Datasheet

IC型号：
PIC16C641
PDF描述：
8-Bit EPROM Microcontrollers with Analog Comparators
文件大小：
661.21KB
PDF页数：
137页
芯片厂家：
MICROCHIP

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PIC16C64X & PIC16C66X

5.4

PORTD and TRISD Registers

(PIC16C661 and PIC16C662 only)

FIGURE 5-8:

Data

bus

PORT

PORTD BLOCK DIAGRAM (IN

I/O PORT MODE)

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

ers. Each pin is individually con铿乬urable as an input or

output.

PORTD can be con铿乬ured 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.

I/O pin

(1)

Data Latch

TRIS

TRIS Latch

Schmitt

Trigger

input

buffer

RD TRIS

RD PORT

Note 1: I/O pins have protection diodes to V

and V

TABLE 5-7:

Name

RD0/PSP0

RD1/PSP1

RD2/PSP2

RD3/PSP3

RD4/PSP4

RD5/PSP5

RD6/PSP6

PORTD FUNCTIONS

Bit#

bit0

bit1

bit2

bit3

bit4

bit5

bit6

Buffer Type

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

RD7/PSP7

bit7

ST/TTL

(1)

Input/output port pin or parallel slave port bit7

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

Note 1: Input buffers are Schmitt Triggers when in I/O mode and TTL buffers when in Parallel Slave Port Mode.

TABLE 5-8:

Address Name

08h

88h

89h

PORTD

TRISD

TRISE

SUMMARY OF REGISTERS ASSOCIATED WITH PORTD

Bit 7

RD7

Bit 6

RD6

Bit 5

RD5

Bit 4

RD4

TRISD4

PSPMODE

Bit 3

RD3

Bit 2

RD2

Bit 1

RD1

Bit 0

RD0

Value on:

POR,

BOR

xxxx xxxx

Value on all

other resets

uuuu uuuu

1111 1111

0000 -111

TRISD7 TRISD6 TRISD5

IBF

OBF

IBOV

TRISD3 TRISD2 TRISD1 TRISD0

1111 1111

鈥?/div>

TRISE2 TRISE1 TRISE0

0000 -111

Legend:

= unknown,

= unchanged,

= unimplemented read as '0'. Shaded cells are not used by PORTD.

漏

1996 Microchip Technology Inc.

Preliminary

DS30559A-page 35

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