PIC16F628A-ESLASHML datasheet(80/168 Pages) MICROCHIP

номер детали	PIC16F628A-E/ML

подробное описание детали	FLASH-Based 8-Bit CMOS Microcontrollers

PDF	168 Pages

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производитель	MICROCHIP [Microchip Technology]

домашняя страница	http://www.microchip.com

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80 / 168 page

PIC16F627A/628A/648A

DS40044A-page 78

Preliminary

 2002 Microchip Technology Inc.

FIGURE 12-7:

ASYNCHRONOUS TRANSMISSION (BACK TO BACK)

TABLE 12-6:

REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR

Value on

all other

RESETS

0Ch

PIR1

EEIF

CMIF

RCIF

TXIF

—

CCP1IF

TMR2IF

TMR1IF

0000 -000

18h

RCSTA

SPEN

RX9

SREN

CREN

ADEN

FERR

OERR

RX9D

0000 000x

19h

TXREG USART Transmit data register

0000 0000

8Ch

PIE1

EEIE

CMIE

RCIE

TXIE

—

CCP1IE

TMR2IE

TMR1IE

0000 -000

98h

TXSTA

CSRC

TX9

TXEN

SYNC

—

BRGH

TRMT

TX9D

0000 -010

99h

SPBRG Baud Rate Generator Register

0000 0000

Legend: x = unknown, - = unimplemented locations read as '0'.

Shaded cells are not used for Asynchronous Transmission.

Transmit Shift Reg.

Write to TXREG

BRG output

(shift clock)

RB2/TX/CK (pin)

TXIF bit

(interrupt reg. flag)

TRMT bit

(Transmit shift

reg. empty flag)

Word 1

Word 2

WORD 1

WORD 2

START Bit

STOP Bit

START Bit

Transmit Shift Reg.

WORD 1

WORD 2

Bit 0

Bit 1

Bit 7/8

Bit 0

Note:

This timing diagram shows two consecutive transmissions.

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