Datasheet
PIC16C63A/65B/73B/74B
DS30605D-page 56 1998-2013 Microchip Technology Inc.
REGISTER 10-1: SSPSTAT: SYNC SERIAL PORT STATUS REGISTER (ADDRESS 94h)
R/W-0 R/W-0 R-0 R-0 R-0 R-0 R-0 R-0
SMP CKE D/A PSR/WUA BF
bit 7 bit 0
bit 7 SMP: SPI Data Input Sample Phase
SPI Master mode:
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time (Microwire
®
)
SPI Slave mode:
SMP must be cleared when SPI is used in Slave mode
I
2
C mode:
This bit must be maintained clear
bit 6 CKE: SPI Clock Edge Select (see Figure 10-2, Figure 10-3, and Figure 10-4)
SPI mode:
CKP = 0:
1 = Data transmitted on rising edge of SCK (Microwire alternate)
0 = Data transmitted on falling edge of SCK
CKP = 1:
1 = Data transmitted on falling edge of SCK (Microwire default)
0 = Data transmitted on rising edge of SCK
I
2
C mode:
This bit must be maintained clear
bit 5 D/A
: Data/Address bit (I
2
C mode only)
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4 P: STOP bit (I
2
C 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 S: START bit (I
2
C 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
bit 2 R/W
: Read/Write bit information (I
2
C mode only). This bit holds the R/W bit information follow-
ing 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 UA: Update Address (10-bit I
2
C mode only)
1 = Indicates that the user needs to update the address in the SSPADD register
0 = Address does not need to be updated
bit 0 BF: Buffer Full Status bit
Receive (SPI and I
2
C modes):
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit (I
2
C mode only):
1 = Transmit in progress, SSPBUF is full
0 = Transmit complete, SSPBUF is empty
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ’1’ = Bit is set ’0’ = Bit is cleared x = Bit is unknown