PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 190
PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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PIC18FXX8
FIGURE 18-2:
FIGURE 18-3:
TABLE 18-6:
DS41159B-page 188
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE
PIR1
PIE1
IPR1
RCSTA
TXREG USART Transmit Register
TXSTA
SPBRG Baud Rate Generator Register
Legend: x = unknown, - = unimplemented locations read as '0'.
Register Empty Flag)
Register Empty Flag)
(Interrupt Reg. Flag)
Name
Note: This timing diagram shows two consecutive transmissions.
Reg. Empty Flag)
RC6/TX/CK (pin)
RC6/TX/CK (pin)
Write to TXREG
Write to TXREG
(Transmit Buffer
(Transmit Shift
(Transmit Shift
BRG Output
(Shift Clock)
BRG Output
(Shift Clock)
Shaded cells are not used for Asynchronous Transmission.
TRMT bit
TRMT bit
TXIF bit
TXIF bit
PSPIF
PSPIE
PSPIP
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
ADIF
ADIE
ADIP
Bit 6
Transmit Shift Reg.
RX9
TX9
Word 1
Word 1
Transmit Shift Reg
Word 1
Word 1
SREN
START bit
TXEN
RCIF
RCIE
RCIP
Bit 5
START bit
Word 2
CREN ADDEN
SYNC
TXIE
TXIP
Bit 4
TXIF
bit 0
Preliminary
bit 0
SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
SSPIP CCP1IP TMR2IP TMR1IP 0000 0000 0000 0000
RBIE
Bit 3
—
bit 1
Word 1
bit 1
TMR0IF INT0IF
Word 1
BRGH
FERR
Bit 2
OERR
TRMT
Bit 1
bit 7/8
Word 2
Transmit Shift Reg.
RX9D
TX9D
RBIF
bit 7/8
Bit 0
2002 Microchip Technology Inc.
STOP bit
0000 000x 0000 000u
0000 000x 0000 000x
0000 0000 0000 0000
0000 -010 0000 -010
0000 0000 0000 0000
POR, BOR
STOP bit
Value on
START bit
Word 2
Value on
RESETS
all other
bit 0
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