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PIC18F4550ESOSQTP Datasheet(PDF) 256 Page - Microchip Technology

Part # PIC18F4550ESOSQTP
Description  28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollerswith nanoWatt Technology
PDF  438 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4550ESOSQTP Datasheet(HTML) 256 Page - Microchip Technology

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PIC18F2455/2550/4455/4550
DS39632E-page 254
© 2009 Microchip Technology Inc.
FIGURE 20-3:
EUSART TRANSMIT BLOCK DIAGRAM
FIGURE 20-4:
ASYNCHRONOUS TRANSMISSION, TXCKP = 0 (TX NOT INVERTED)
FIGURE 20-5:
ASYNCHRONOUS TRANSMISSION (BACK TO BACK),
TXCKP = 0 (TX NOT INVERTED)
TXIF
TXIE
Interrupt
TXEN
Baud Rate CLK
SPBRG
Baud Rate Generator
TX9D
MSb
LSb
Data Bus
TXREG Register
TSR Register
(8)
0
TX9
TRMT
SPEN
TX pin
Pin Buffer
and Control
8
• • •
SPBRGH
BRG16
TXCKP
Word 1
Word 1
Transmit Shift Reg
Start bit
bit 0
bit 1
bit 7/8
Write to TXREG
BRG Output
(Shift Clock)
TX (pin)
TXIF bit
(Transmit Buffer
Reg. Empty Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
1 TCY
Stop bit
Word 1
Transmit Shift Reg.
Write to TXREG
BRG Output
(Shift Clock)
TX (pin)
TXIF bit
(Interrupt Reg. Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1
Word 2
Word 1
Word 2
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.
1 TCY
1 TCY
Start bit



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