PIC18F248-E/L MICROCHIP [Microchip Technology], PIC18F248-E/L Datasheet - Page 192
PIC18F248-E/L
Manufacturer Part Number
PIC18F248-E/L
Description
28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F248-EL.pdf
(402 pages)
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FIGURE 18-2:
FIGURE 18-3:
TABLE 18-6:
DS41159E-page 190
Legend: x = unknown, - = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Note 1:
PIC18FXX8
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE
PIR1
PIE1
IPR1
RCSTA
TXREG
TXSTA
SPBRG Baud Rate Generator Register
(Interrupt Reg. Flag)
Note: This timing diagram shows two consecutive transmissions.
Name
Reg. Empty Flag)
Reg. Empty Flag)
RC6/TX/CK (pin)
Reg. Empty Flag)
Write to TXREG
(Transmit Buffer
RC6/TX/CK (pin)
Write to TXREG
(Transmit Shift
(Transmit Shift
BRG Output
(Shift Clock)
BRG Output
(Shift Clock)
TRMT bit
TRMT bit
TXIF bit
USART Transmit Register
These registers or register bits are not implemented on the PIC18F248 and PIC18F258 and read as ‘0’s.
TXIF bit
PSPIE
PSPIP
PSPIF
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
(1)
(1)
(1)
ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
Word 1
Transmit Shift Reg
Word 1
Transmit Shift Reg.
ADIF
ADIE
ADIP
Word 1
Bit 6
RX9
TX9
Word 1
Start bit
SREN
TXEN
RCIE
RCIP
RCIF
Start bit
Bit 5
Word 2
CREN ADDEN
SYNC
Bit 4
TXIF
TXIE
TXIP
bit 0
bit 0
SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
SSPIP CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111
RBIE
Bit 3
—
bit 1
Word 1
bit 1
Word 1
TMR0IF INT0IF
BRGH
FERR
Bit 2
OERR
TRMT
Bit 1
bit 7/8
Word 2
Transmit Shift Reg.
bit 7/8
RX9D
TX9D
RBIF
Bit 0
© 2006 Microchip Technology Inc.
Stop bit
Stop bit
0000 000x 0000 000u
0000 000x 0000 000u
0000 0000 0000 0000
0000 -010 0000 -010
0000 0000 0000 0000
POR, BOR
Value on
Start bit
Word 2
Value on
all other
Resets
bit 0
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