PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 192
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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 18-5:
TABLE 18-7:
DS41159B-page 190
INTCON
PIR1
PIE1
IPR1
RCSTA
RCREG
TXSTA
SPBRG
Legend: x = unknown, - = unimplemented locations read as '0'. Shaded cells are not used for Asynchronous Reception.
Rcv Buffer Reg
(Interrupt Flag)
Name
Note: This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
Buffer Reg
Read Rcv
OERR bit
Rcv shift
RX (pin)
RCREG
CREN
causing the OERR (overrun) bit to be set.
RCIF
Reg
USART Receive Register
Baud Rate Generator Register
GIE/GIEH
PSPIF
PSPIE
PSPIP
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
ASYNCHRONOUS RECEPTION
START
PEIE/GIEL TMR0IE
bit
ADIE
ADIP
Bit 6
ADIF
RX9
TX9
bit0
bit1
SREN
TXEN
RCIE
RCIP
RCIF
Bit 5
INT0IE
CREN
SYNC
TXIE
TXIP
Bit 4
TXIF
bit7/8
Preliminary
STOP
bit
ADDEN
SSPIE
SSPIP
SSPIF
RBIE
Bit 3
Word 1
RCREG
—
START
bit
TMR0IF
CCP1IF
CCP1IE TMR2IE TMR1IE
CCP1IP TMR2IP TMR1IP
bit0
FERR
BRGH
Bit 2
TMR2IF TMR1IF
INT0IF
OERR
TRMT
Bit 1
bit7/8 STOP
Word 2
RCREG
RX9D
TX9D
bit
RBIF
Bit 0
START
2002 Microchip Technology Inc.
bit
0000 000x
0000 0000
0000 0000
0000 0000
0000 000x
0000 0000
0000 -010
0000 0000
POR, BOR
Value on
bit7/8
0000 000u
0000 0000
0000 0000
0000 0000
0000 000x
0000 0000
0000 -010
0000 0000
STOP
Value on
all other
RESETS
bit
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