PIC18FXX20
REGISTER 17-3: SSPSTAT: MSSP STATUS REGISTER (I2C MODE)
R/W-0
SMP
R/W-0
CKE
R-0
D/A
R-0
P
R-0
S
R-0
R/W
R-0
UA
R-0
BF
bit 7
bit 0
bit 7
bit 6
bit 5
SMP: Slew Rate Control bit
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)
CKE: SMBus Select bit
In Master or Slave mode:
1= Enable SMBus specific inputs
0= Disable SMBus specific inputs
D/A: Data/Address bit
In Master mode:
Reserved
In Slave mode:
1= Indicates that the last byte received or transmitted was data
0= Indicates that the last byte received or transmitted was address
bit 4
bit 3
bit 2
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.
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.
R/W: Read/Write bit Information (I2C mode only)
In Slave mode:
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.
In Master mode:
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.
bit 1
bit 0
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
BF: Buffer Full Status bit
In Transmit mode:
1= Receive complete, SSPBUF is full
0= Receive not complete, SSPBUF is empty
In Receive mode:
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
- 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
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 167
MICROCHIP [ MICROCHIP ]
