PIC18LF4331T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF4331T-I/SO

28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

Microchip Technology 

PIC18F2331/2431/4331/4431

FIGURE 20-2:

EUSART TRANSMIT BLOCK DIAGRAM

TXIE

TXIF

MSb

(8)

Interrupt

TXEN Baud Rate CLK

Data Bus

TXREG Register

8



TSR Register

BRG16

SPBRGH SPBRG

Baud Rate Generator

TX9

TX9D

LSb

0

Pin Buffer

and Control

RC6/TX/CK/SS Pin

TRMT

SPEN

FIGURE 20-3:

ASYNCHRONOUS TRANSMISSION

Write to TXREG

BRG Output

(Shift Clock)

RC6/TX/CK/SS

(pin)

TXIF bit

(Interrupt Reg. Flag)

Word 1

Start bit

bit 0

1 TCY

bit 1

Word 1

TRMT bit

(Transmit Shift

Reg. Empty Flag)

Word 1

Transmit Shift Reg

bit 7/8 Stop bit

FIGURE 20-4:

Write to TXREG

BRG Output

(Shift Clock)

RC6/TX/CK/SS

(pin)

TXIF bit

(Interrupt Reg. Flag)

TRMT bit

(Transmit Shift

Reg. Empty Flag)

ASYNCHRONOUS TRANSMISSION (BACK TO BACK)

Word 1

Word 2

1 TCY

Start bit

bit 0

Word 1

Transmit Shift Reg.

1 TCY

bit 1

Word 1

bit 7/8

Stop bit

Start bit

bit 0

Word 2

Word 2

Transmit Shift Reg.

Note: This timing diagram shows two consecutive transmissions.

 2010 Microchip Technology Inc.

DS39616D-page 227

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