PIC16C774T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C774T-I/SO

28/40-Pin, 8-Bit CMOS Microcontrollers w/ 12-Bit A/D

Microchip Technology 

PIC16C77X

FIGURE 9-6: USART RECEIVE BLOCK DIAGRAM

x64 Baud Rate CLK

SPBRG

Baud Rate Generator

CREN

 64

or

 16

RC7/RX/DT

Pin Buffer

and Control

Data

Recovery

OERR

FERR

MSb

RSR register

Stop (8) 7  1

LSb

0 Start

RX9

8

SPEN

RX9

ADDEN

RX9

ADDEN

RSR<8>

Enable

Load of

Receive

Buffer

8

RX9D

RCREG register

FIFO

Interrupt

RCIF

RCIE

8

Data Bus

FIGURE 9-7: ASYNCHRONOUS RECEPTION WITH ADDRESS DETECT

RC7/RX/DT (pin)

Start

bit bit0 bit1

Start

bit8 Stop bit bit0

bit

bit8 Stop

bit

Load RSR

Read

Bit8 = 0, Data Byte

Bit8 = 1, Address Byte

WORD 1

RCREG

RCIF

Note: This timing diagram shows a data byte followed by an address byte. The data byte is not read into the RCREG (receive buffer)

because ADDEN = 1.

 1999-2013 Microchip Technology Inc.

Advance Information

DS30275B-page 105

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