PIC17C7XX Datasheet, PDF (307/328 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
FIGURE F-17: SSPSTAT: SYNC SERIAL PORT STATUS REGISTER (ADDRESS: 13h, BANK 6)
R/W-0 R/W-0 R-0
R-0
R-0
R-0
R-0
R-0
SMP CKE
D/A
P
S
R/W
UA
BF
R = Readable bit
bit7
bit0 ^{W = Writable bit}
U = Unimplemented bit, read
as ‘0’
- n = Value at POR reset
bit 7:
SMP: SPI Data Input Sample Phase bit
SPI Master Mode
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
bit 6:
bit 5:
bit 4:
bit 3:
bit 2:
bit 1:
bit 0:
SPI Slave Mode
SMP must be cleared when SPI is used in slave mode
In I²C master or slave mode:
1= Slew rate control disabled for standard speed mode (100 kHz and 1 MHz)
0= Slew rate control enabled for high speed mode (400 kHz)
CKE: SPI Clock Edge Select (Figure 15-9, Figure 15-11, and Figure 15-12)
CKP = 0
1 = Data transmitted on rising edge of SCK
0 = Data transmitted on falling edge of SCK
CKP = 1
1 = Data transmitted on falling edge of SCK
0 = Data transmitted on rising edge of SCK
D/A: Data/Address bit (I²C slave mode only)
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
P: Stop bit (I²C mode only)
This bit is cleared when the SSP module is disabled, SSPEN is cleared
1 = Indicates that a stop bit has been detected last (this bit is '0' on RESET)
0 = Stop bit was not detected last
S: Start bit (I²C mode only)
This bit is cleared when the SSP module is disabled, SSPEN is cleared
1 = Indicates that a start bit has been detected last (this bit is '0' on RESET)
0 = Start bit was not detected last
R/W: Read/Write bit information (I²C mode only)
This bit holds the R/W bit information following the last address match. This bit is only valid from the address match to
the next start bit, stop bit, or not ACK bit.
In I²C slave mode:
1 = Read
0 = Write
In I²C master mode:
1 = Transmit is in progress
0 = Transmit is not in progress.
Or’ing this bit with SEN, RSEN, PEN, RCEN, or ACKEN will indicate if the SSP is in IDLE mode.
UA: Update Address (10-bit I²C slave mode only)
1 = Indicates that the user needs to update the address in the SSPADD register
0 = Address does not need to be updated
BF: Buffer Full Status bit
Receive (SPI and I²C modes)
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit (I²C mode only)
1 = Data Transmit in progress (does not include the ACK and stop bits), SSPBUF is full
0 = Data Transmit complete (does not include the ACK and stop bits), SSPBUF is empty
© 1998 Microchip Technology Inc.
DS30289A-page 307