PIC18F242 datasheet(137/332 Pages) MICROCHIP

137 / 332 page

DS39564C-page 135

PIC18FXX2

SSPSTAT: MSSP STATUS REGISTER (I2C MODE)

R/W-0

R-0

SMP

CKE

D/A

R/W

bit 7

bit 0

bit 7

SMP: Slew Rate Control bit

In Master or Slave mode:

= Slew rate control disabled for Standard Speed mode (100 kHz and 1 MHz)

= Slew rate control enabled for High Speed mode (400 kHz)

bit 6

CKE: SMBus Select bit

In Master or Slave mode:

= Enable SMBus specific inputs

= Disable SMBus specific inputs

bit 5

D/A: Data/Address bit

In Master mode:

Reserved

In Slave mode:

= Indicates that the last byte received or transmitted was data

= Indicates that the last byte received or transmitted was address

bit 4

P: STOP bit

= Indicates that a STOP bit has been detected last

= STOP bit was not detected last

Note:

This bit is cleared on RESET and when SSPEN is cleared.

bit 3

S: START bit

= Indicates that a start bit has been detected last

= START bit was not detected last

Note:

This bit is cleared on RESET and when SSPEN is cleared.

bit 2

R/W: Read/Write bit Information (I2C mode only)

In Slave mode:

= Read

= 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:

= Transmit is in progress

= 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

UA: Update Address (10-bit Slave mode only)

= Indicates that the user needs to update the address in the SSPADD register

= Address does not need to be updated

bit 0

BF: Buffer Full Status bit

In Transmit mode:

= Receive complete, SSPBUF is full

= Receive not complete, SSPBUF is empty

In Receive mode:

= Data transmit in progress (does not include the ACK and STOP bits), SSPBUF is full

= 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

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