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| PIC16C6X_13 Datasheet, PDF (117/334 Pages) Microchip Technology – null8-Bit CMOS Microcontrollers | |||
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PIC16C6X
TABLE 12-8: REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
Address 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
0Ch
PIR1
PSPIF(1) (2) RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
18h
RCSTA SPEN RX9 SREN CREN â FERR OERR RX9D 0000 -00x 0000 -00x
19h
TXREG USART Transmit Register
0000 0000 0000 0000
8Ch
PIE1
PSPIE(1) (2) RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
98h
TXSTA CSRC TX9 TXEN SYNC â BRGH TRMT TX9D 0000 -010 0000 -010
99h
SPBRG Baud Rate Generator Register
0000 0000 0000 0000
Legend: x = unknown, - = unimplemented locations read as '0'. Shaded cells are not used for Synchronous Master Transmission.
Note 1: PSPIE and PSPIF are reserved on the PIC16C63/R63/66, always maintain these bits clear.
2: PIE1<6> and PIR1<6> are reserved, always maintain these bits clear.
FIGURE 12-12: SYNCHRONOUS TRANSMISSION
Q1Q2 Q3Q4 Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2 Q3Q4
RC7/RX/DT pin
RC6/TX/CK pin
Write to
TXREG reg
TXIF bit
(Interrupt flag)
TRMT bTiRt MT
Write word1
Bit 0
Bit 1
WORD 1
Bit 2
Write word2
Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
Bit 7
Bit 0
Bit 1
WORD 2
Bit 7
TXEN bit '1'
'1'
Note: Sync master mode; SPBRG = '0'. Continuous transmission of two 8-bit words
FIGURE 12-13: SYNCHRONOUS TRANSMISSION THROUGH TXEN
RC7/RX/DT pin
bit0
bit1
bit2
bit6
bit7
RC6/TX/CK pin
Write to
TXREG reg
TXIF bit
TRMT bit
TXEN bit
ï 1997-2013 Microchip Technology Inc.
DS30234E-page 117
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