Microchip Technology DM164134 Data Sheet
© 2006 Microchip Technology Inc.
DS41159E-page 153
PIC18FXX8
REGISTER 17-3:
SSPSTAT: MSSP STATUS REGISTER (I
2
C MODE)
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
bit 7
bit 0
bit 7
SMP: Slew Rate Control bit
In Master or Slave mode:
1
In 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)
bit 6
CKE: SMBus Select bit
In Master or Slave mode:
1
In Master or Slave mode:
1
= Enable SMBus specific inputs
0
= Disable SMBus specific inputs
bit 5
D/A: Data/Address bit
In Master mode:
Reserved.
In Master mode:
Reserved.
In Slave mode:
1
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
1
= Indicates that a Stop bit has been detected last
0
= Stop bit was not detected last
Note:
This bit is cleared on Reset and when SSPEN is cleared.
bit 3
S: Start bit
1
= Indicates that a Start bit has been detected last
0
= Start bit was not detected last
Note:
This bit is cleared on Reset and when SSPEN is cleared.
bit 2
R/W: Read/Write Information bit (I
2
C mode only)
In Slave mode:
1
1
= Read
0
= Write
Note:
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.
only valid from the address match to the next Start bit, Stop bit or not ACK bit.
In Master mode:
1
1
= Transmit is in progress
0
= Transmit is not in progress
Note:
ORing this bit with SEN, RSEN, PEN, RCEN or ACKEN will indicate if the MSSP is
in Idle mode.
in Idle mode.
bit 1
UA: Update Address bit (10-bit 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
bit 0
BF: Buffer Full Status bit
In Transmit mode:
1
In Transmit mode:
1
= Receive complete, SSPBUF is full
0
= Receive not complete, SSPBUF is empty
In Receive mode:
1
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
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