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PIC18F4580-E/ML Datasheet(PDF) 242 Page - Microchip Technology

Part # PIC18F4580-E/ML
Description  28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
PDF  490 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4580-E/ML Datasheet(HTML) 242 Page - Microchip Technology

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PIC18F2480/2580/4480/4580
DS39637D-page 242
© 2009 Microchip Technology Inc.
FIGURE 19-3:
EUSART TRANSMIT BLOCK DIAGRAM
FIGURE 19-4:
ASYNCHRONOUS TRANSMISSION
FIGURE 19-5:
ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
TXIF
TXIE
Interrupt
TXEN
Baud Rate CLK
SPBRG
Baud Rate Generator
MSb
LSb
Data Bus
TXREG Register
TSR Register
(8)
0
TX9
TRMT
SPEN
TX Pin
Pin Buffer
and Control
8
• • •
SPBRGH
BRG16
TX9D
Word 1
Word 1
Transmit Shift Reg
Start bit
bit 0
bit 1
bit 7/8
Write to TXREG
Word 1
BRG Output
(Shift Clock)
TX
TXIF bit
(Transmit Buffer
Reg. Empty Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
1 TCY
(pin)
Stop bit
Transmit Shift Reg.
Write to TXREG
BRG Output
(Shift Clock)
TX
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
(pin)
Start bit



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