Datasheet

PIC18F6525/6621/8525/8621
DS39612C-page 228  2003-2013 Microchip Technology Inc.
FIGURE 19-11: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
TABLE 19-7: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
RC7/RX1/DT1 pin
RC6/TX1/CK1 pin
Write to
TXREG1 reg
TX1IF bit
TRMT bit
bit 0
bit 1
bit 2
bit 6 bit 7
TXEN bit
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 RC1IF TX1IF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1
PSPIE
(1)
ADIE RC1IE TX1IE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
IPR1
PSPIP
(1)
ADIP RC1IP TX1IP SSPIP CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111
PIR3
— — RC2IF TX2IF TMR4IF CCP5IF CCP4IF CCP3IF --00 0000 --00 0000
PIE3
— — RC2IE TX2IE TMR4IE CCP5IE CCP4IE CCP3IE --00 0000 --00 0000
IPR3
— — RC2IP TX2IP TMR4IP CCP5IP CCP4IP CCP3IP --11 1111 --11 1111
RCSTAx SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
TXREGx Enhanced USARTx Transmit Register 0000 0000 0000 0000
TXSTAx CSRC TX9 TXEN SYNC SENDB
BRGH TRMT TX9D 0000 0010 0000 0010
BAUDCONx
— RCIDL — SCKP BRG16 — WUE ABDEN -1-0 0-00 -1-0 0-00
SPBRGHx Enhanced USARTx Baud Rate Generator Register High Byte 0000 0000 0000 0000
SPBRGx Enhanced USARTx Baud Rate Generator Register Low Byte 0000 0000 0000 0000
Legend: x = unknown, – = unimplemented, read as ‘0’. Shaded cells are not used for synchronous master transmission.
Note 1: Enabled only in Microcontroller mode for PIC18F8525/8621 devices.