2001 Microchip Technology Inc.
DS39026C-page 117
PIC18CXX2
bit 3
S: START bit
(I2C mode only. This bit is cleared when the MSSP 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
bit 2
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 MSSP is in
IDLE mode.
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
= 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
REGISTER 14-1:
SSPSTAT: MSSP STATUS REGISTER (CONTINUED)
R/W-0
R-0
SMP
CKE
D/A
PS
R/W
UA
BF
bit 7
bit 0
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
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