PIC17C42 Microchip Technology, PIC17C42 Datasheet - Page 94

• Manufacturer Part Number: PIC17C42
• Description: High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
• Manufacturer: Microchip Technology

PIC17C4X
TABLE 13-7:
FIGURE 13-9: SYNCHRONOUS TRANSMISSION
FIGURE 13-10: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
DS30412C-page 94
(RA4/RX/DT pin)
Address
(RA5/TX/CK pin)
16h, Bank 1
13h, Bank 0
16h, Bank 0
17h, Bank 1
15h, Bank 0
17h, Bank 0
Legend: x = unknown, u = unchanged, - = unimplemented read as a '0', shaded cells are not used for synchronous
Note 1: Other (non power-up) resets include: external reset through MCLR and Watchdog Timer Reset.
Interrupt flag
Write to
(RA4/RX/DT pin)
(RA5/TX/CK pin)
TXREG
TRMT
TXEN
TXIF
DT
CK
master transmission.
Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
'1'
Name
PIR
RCSTA
TXREG
PIE
TXSTA
SPBRG
TRMT bit
Note: Sync master mode; BRG = 0. Continuous transmission of two 8-bit words.
TXIF bit
Write to
TXREG
Write word 1
REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
DT
CK
Baud rate generator register
CSRC
SPEN
RBIF
RBIE
Bit 7
TX7
bit0
TMR3IF TMR2IF TMR1IF
TMR3IE TMR2IE TMR1IE
Write word 2
Bit 6
RX9
TX6
TX9
Word 1
bit1
bit0
SREN
TXEN
Bit 5
TX5
bit2
CREN
SYNC
Bit 4
TX4
bit1
CA2IF
CA2IE
Bit 3
TX3
—
—
Q3 Q4
bit2
Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
bit7
CA1IF
FERR
CA1IE
Bit 2
TX2
—
bit0
OERR
TRMT
Bit 1
TXIF
TXIE
TX1
Word 2
bit6
RX9D
TX9D
RCIF
RCIE
Bit 0
TX0
1996 Microchip Technology Inc.
0000 0010
0000 -00x
xxxx xxxx
0000 0000
0000 --1x
xxxx xxxx
Power-on
bit7
Value on
Reset
other resets
Value on all
0000 0010
0000 -00u
uuuu uuuu
0000 0000
0000 --1u
uuuu uuuu
(Note1)