PIC16LF720_11 Datasheet, PDF (133/244 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC16(L)F720/721
FIGURE 16-6:
SYNCHRONOUS TRANSMISSION
RX/DT
pin
TX/CK pin
bit 0
bit 1
bit 2
bit 7
Word 1
Write to
TXREG Reg
TXIF bit
(Interrupt Flag)
Write Word 1
TRMT bit
Write Word 2
bit 0
bit 1
Word 2
‘1’
TXEN bit
Note:
Synchronous Master mode, SPBRG = 0, continuous transmission of two 8-bit words.
FIGURE 16-7:
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RX/DT pin
bit 0
bit 1
bit 2
bit 6
TX/CK pin
Write to
TXREG reg
TXIF bit
bit 7
‘1’
bit 7
TRMT bit
TXEN bit
TABLE 16-6: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
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
PIE1
PIR1
RCSTA
SPBRG
TRISC
TXREG
TXSTA
Legend:
GIE
PEIE TMR0IE INTE RABIE TMR0IF INTF RABIF 0000 000x 0000 000x
TMR1GIE ADIE
RCIE
TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
TMR1GIF ADIF
RCIF
TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
SPEN
RX9
SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
BRG7 BRG6 BRG5 BRG4 BRG3 BRG2 BRG1 BRG0 0000 0000 0000 0000
TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 1111 1111 1111 1111
AUSART Transmit Data Register
0000 0000 0000 0000
CSRC
TX9
TXEN SYNC
—
BRGH TRMT TX9D 0000 -010 0000 -010
x = unknown, - = unimplemented read as ‘0’. Shaded cells are not used for synchronous master transmission.
 2011 Microchip Technology Inc.
Preliminary
DS41430B-page 133