PIC16C62B/72A
REGISTER 8-1: SSPSTAT: SYNC SERIAL PORT STATUS REGISTER (ADDRESS 94h)
R/W-0 R/W-0
SMP CKE
bit7
R-0
D/A
R-0
P
R-0
S
R-0
R-0
UA
R-0
BF
R/W
R = Readable bit
W = Writable bit
U = Unimplemented bit, read
as ‘0’
bit0
- n =Value at POR reset
bit 7:
SMP: SPI data input sample phase
SPI Master Operation
1= Input data sampled at end of data output time
0= Input data sampled at middle of data output time
SPI Slave Mode
SMP must be cleared when SPI is used in slave mode
I2C Mode
This bit must be maintained clear
bit 6:
CKE: SPI Clock Edge Select
SPI Mode
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
I2C Mode
This bit must be maintained clear
bit 5:
bit 4:
D/A: Data/Address bit (I2C 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, or when the Start bit is
detected last, 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
bit 3:
bit 2:
S: Start bit (I2C mode only. This bit is cleared when the SSP module is disabled, or when the Stop bit is
detected last, 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 ACK bit.
1= Read
0= Write
bit 1:
bit 0:
UA: Update Address (10-bit I2C 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= Transmit in progress, SSPBUF is full
0= Transmit complete, SSPBUF is empty
DS35008B-page 46
Preliminary
1999 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
