PIC16F913/914/916/917/946
FIGURE 9-6:
SYNCHRONOUS TRANSMISSION
RX/DT
pin
bit 0
bit 1
bit 2
bit 7
bit 0
bit 1
Word 2
bit 7
Word 1
TX/CK pin
Write to
TXREG Reg
Write Word 1
Write Word 2
TXIF bit
(Interrupt Flag)
TRMT bit
‘1’
‘1’
TXEN bit
Note:
Sync Master mode, SPBRG = 0, continuous transmission of two 8-bit words.
FIGURE 9-7:
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RX/DT pin
bit 0
bit 2
bit 1
bit 6
bit 7
TX/CK pin
Write to
TXREG reg
TXIF bit
TRMT bit
TXEN bit
TABLE 9-6:
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
LCDCON
LCDSE1
PIE1
GIE
LCDEN
SE15
EEIE
PEIE
SLPEN
SE14
ADIE
T0IE
INTE
RBIE
CS1
T0IF
CS0
INTF
LMUX1
SE9
RBIF
LMUX0
SE8
0000 000x 0000 000x
0001 0011 0001 0011
0000 0000 0000 0000
WERR VLCDEN
SE13
RCIE
SE12
TXIE
SE11
SE10
SSPIE
SSPIF
ADDEN
BRG3
SSPM3
CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIR1
EEIF
ADIF
RCIF
TXIF
RCSTA
SPBRG
SSPCON
TRISC
SPEN
BRG7
WCOL
RX9
SREN
BRG5
SSPEN
CREN
BRG4
CKP
FERR
BRG2
OERR
BRG1
RX9D
BRG0
0000 000x 0000 000x
0000 0000 0000 0000
BRG6
SSPOV
SSPM2
SSPM1
SSPM0 0000 0000 0000 0000
TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 1111 1111 1111 1111
TXREG
TXSTA
Legend:
AUSART Transmit Data Register
CSRC TX9 TXEN
0000 0000 0000 0000
0000 -010 0000 -010
SYNC
—
BRGH
TRMT
TX9D
x= unknown, -= unimplemented read as ‘0’. Shaded cells are not used for Synchronous Master Transmission.
DS41250F-page 136
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
