PIC16F946 Datasheet, PDF (147/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
TABLE 11-8: 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
0Bh, 8Bh, INTCON GIE
10Bh,18Bh
PEIE T0IE INTE RBIE T0IF
INTF
RBIF 0000 000x 0000 000x
0Ch
PIR1
EEIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
18h
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
19h
TXREG USART Transmit Data Register
0000 0000 0000 0000
8Ch
PIE1
EEIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
98h
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
99h
SPBRG Baud Rate Generator Register
0000 0000 0000 0000
Legend: x = unknown, – = unimplemented, read as ‘0’. Shaded cells are not used for synchronous master transmission.
FIGURE 11-9:
SYNCHRONOUS TRANSMISSION
Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4
RC7/RX/DT/
SDI/SDA/SEG8
RC6/TX/CK/
SCK/SCL/SEG9
Write to
TXREG reg
TXIF bit
(Interrupt Flag)
bit 0
bit 1
bit 2
Word 1
Write Word 1
Write Word 2
TRMT bit
Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4
bit 7
bit 0
bit 1
bit 7
Word 2
TXEN bit ^{‘1’}
‘1’
Note: Sync Master mode; SPBRG = 0. Continuous transmission of two 8-bit words.
FIGURE 11-10: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RC7/RX/DT/SDI/SDA/SEG8
bit 0
bit 1
bit 2
bit 6
bit 7
RC6/TX/CK/SCK/SCL/SEG9
Write to
TXREG Reg
TXIF bit
TRMT bit
TXEN bit
© 2005 Microchip Technology Inc.
Preliminary
DS41265A-page 145