PIC17C42AT View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC17C42AT

High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

Microchip Technology 

PIC17C4X

FIGURE 13-3: USART TRANSMIT

Sync

Master/Slave

CK/TX

Sync/Async

Sync/Async

TSR

Start 0 1 • • • 7 8 Stop

BRG

÷4

Sync/Async

Clock

÷ 16

DT

Load

8

TXREG 0 1 • • • 7

Bit Count

TXEN/

Write to TXREG

Interrupt

Data Bus

TXSTA<0>

TXIE

FIGURE 13-4: USART RECEIVE

OSC

BRG

Buffer

CK

Logic

SPEN

Buffer

Logic

RX

÷4

Master/Slave

Sync

Sync/Async

Async/Sync

÷ 16

Majority

Detect

Clock

Data

enable

Bit Count

START

Detect

RSR

MSb

LSb

Stop 8 7 • • • 1 0

Interrupt

RCIE

SREN/

CREN/

Start_Bit

RX9

Async/Sync

RCREG

FERR

FERR

RX9D 7 • • • 1 0

RX9D 7 • • • 1 0

FIFO

Logic

Clk

FIFO

Data Bus

© 1996 Microchip Technology Inc.

DS30412C-page 85

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