PIC18F2220/2320/4220/4320
FIGURE 18-7:
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RC7/RX/DT pin
bit 0
bit 2
bit 1
bit 6
bit 7
RC6/TX/CK pin
Write to
TXREG reg
TXIF bit
TRMT bit
TXEN bit
TABLE 18-8: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
Value on
all other
Resets
Value on
POR, BOR
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
INTCON
GIE/
GIEH
PEIE/ TMR0IE INT0IE RBIE TMR0IF INT0IF
GIEL
RBIF
0000 000x 0000 000u
PIR1
PSPIF(1) ADIF
PSPIE(1) ADIE
PSPIP(1) ADIP
RCIF
RCIE
RCIP
TXIF
SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1
TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
TXIP SSPIP CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111
IPR1
RCSTA
SPEN
RX9
SREN CREN ADDEN FERR
OERR
RX9D
0000 -00x 0000 -00x
0000 0000 0000 0000
0000 -010 0000 -010
0000 0000 0000 0000
TXREG USART Transmit Register
TXSTA CSRC TX9 TXEN SYNC
SPBRG Baud Rate Generator Register
—
BRGH
TRMT
TX9D
Legend: x= unknown, - = unimplemented, read as ‘0’. Shaded cells are not used for synchronous master transmission.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18F2X20 devices; always maintain these bits clear.
2003 Microchip Technology Inc.
DS39599C-page 207
MICROCHIP [ MICROCHIP ]
