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PIC18F23K20-E/ML Datasheet(PDF) 241 Page - Microchip Technology

Part # PIC18F23K20-E/ML
Description  28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
PDF  456 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F23K20-E/ML Datasheet(HTML) 241 Page - Microchip Technology

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 2010 Microchip Technology Inc.
DS41303G-page 241
PIC18F2XK20/4XK20
FIGURE 18-4:
ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
TABLE 18-1:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values
on page
INTCON
GIE/GIEH PEIE/GIEL
TMR0IE
INT0IE
RBIE
TMR0IF
INT0IF
RBIF
59
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
62
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
62
IPR1
PSPIP(1)
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
62
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
61
TXREG
EUSART Transmit Register
61
TXSTA
CSRC
TX9
TXEN
SYNC
SENDB
BRGH
TRMT
TX9D
61
BAUDCON
ABDOVF
RCIDL
DTRXP
CKTXP
BRG16
—
WUE
ABDEN
61
SPBRGH
EUSART Baud Rate Generator Register, High Byte
61
SPBRG
EUSART Baud Rate Generator Register, Low Byte
61
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Note 1:
Reserved in PIC18F2XK20 devices; always maintain these bits clear.
Transmit Shift Reg
Write to TXREG
BRG Output
(Shift Clock)
RC4/C2OUT/TX/CK
TXIF bit
(Interrupt Reg. Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1
Word 2
Word 1
Word 2
Start bit
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



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