PIC16F87 datasheet(52/230 Pages) MICROCHIP

tên linh kiện	PIC16F87

Giải thích chi tiết về linh kiện	18/20/28-Pin Enhanced Flash MCUs with nanoWatt Technology

PDF	230 Pages

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nhà sản xuất	MICROCHIP [Microchip Technology]

Trang chủ	http://www.microchip.com

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52 / 230 page

PIC16F87/88

DS30487D-page 52

 2002-2013 Microchip Technology Inc.

TABLE 5-2:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTA

FIGURE 5-1:

BLOCK DIAGRAM OF RA0/AN0:RA1/AN1 PINS

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

RA7

RA6

RA5

RA4

RA3

RA2

RA1

RA0

xxxx 0000

(1)

xxx0 0000(2)

uuuu 0000

(1)

uuu0 0000(2)

85h

TRISA

TRISA7 TRISA6 TRISA5(3) PORTA Data Direction Register

1111 1111

9Fh

ADCON1

ADFM

ADCS2

VCFG1

VCFG0

—

0000 ----

9Bh

ANSEL(4)

—

ANS6

ANS5

ANS4

ANS3

ANS2

ANS1

ANS0

-111 1111

Legend:

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

Note

This value applies only to the PIC16F87.

This value applies only to the PIC16F88.

Pin 5 is an input only; the state of the TRISA5 bit has no effect and will always read ‘1’.

PIC16F88 device only.

Data

Bus

PORTA

TRISA

Data Latch

TRIS Latch

RD TRISA

RD PORTA

Analog

VSS

VDD

I/O pin

Input Mode

To Comparator

TTL

Input Buffer

VDD

To A/D Module Channel Input (PIC16F88 only)

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