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PIC18F258-E/LSQTP Datasheet(PDF) 192 Page - Microchip Technology

Part # PIC18F258-E/LSQTP
Description  28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
PDF  402 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F258-E/LSQTP Datasheet(HTML) 192 Page - Microchip Technology

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PIC18FXX8
DS41159E-page 190
© 2006 Microchip Technology Inc.
FIGURE 18-2:
ASYNCHRONOUS TRANSMISSION
FIGURE 18-3:
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
TABLE 18-6:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Word 1
Stop bit
Word 1
Transmit Shift Reg
Start bit
bit 0
bit 1
bit 7/8
Write to TXREG
BRG Output
(Shift Clock)
RC6/TX/CK (pin)
TXIF bit
(Transmit Buffer
Reg. Empty Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1
Transmit Shift Reg.
Write to TXREG
BRG Output
(Shift Clock)
RC6/TX/CK (pin)
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.
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE
RBIE
TMR0IF INT0IF
RBIF
0000 000x 0000 000u
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
IPR1
PSPIP(1)
ADIP
RCIP
TXIP
SSPIP CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
0000 000x 0000 000u
TXREG
USART Transmit Register
0000 0000 0000 0000
TXSTA
CSRC
TX9
TXEN
SYNC
—
BRGH
TRMT
TX9D
0000 -010 0000 -010
SPBRG
Baud Rate Generator Register
0000 0000 0000 0000
Legend:
x
= unknown, - = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Note 1:
These registers or register bits are not implemented on the PIC18F248 and PIC18F258 and read as ‘0’s.



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