PIC16F72-E Datasheet, PDF (46/136 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontoller with A/D Converter

PIC16F72
REGISTER 9-1:
SSPSTAT: SYNCHRONOUS 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
P
bit 7
S
R/W
UA
BF
bit 0
bit 7
SMP: SPI Data Input Sample Phase bits
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
I²C mode:
This bit must be maintained clear
bit 6
CKE: SPI Clock Edge Select bits (Figure 9-2, Figure 9-3, and Figure 9-4)
SPI mode, CKP = 0:
1 = Data transmitted on rising edge of SCK (Microwire alternate)
0 = Data transmitted on falling edge of SCK
SPI mode, CKP = 1:
1 = Data transmitted on falling edge of SCK (Microwire default)
0 = Data transmitted on rising edge of SCK
I²C mode:
This bit must be maintained clear
bit 5
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
bit 4
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
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
bit 2
R/W: Read/Write Information bit (I²C 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 bit (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
bit 0
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
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
DS39597C-page 44
© 2007 Microchip Technology Inc.