Microchip Technology AC244044 Data Sheet

PIC16(L)F1825/1829

DS41440C-page 288

 2010-2012 Microchip Technology Inc.

REGISTER 25-1:

SSPxSTAT: SSPx STATUS REGISTER

R/W-0/0

R-0/0

SMP

CKE

D/A

R/W

bit 7

bit 0

Legend:
R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n/n = Value at POR and BOR/Value at all other Resets

‘1’ = Bit is set

‘0’ = Bit is cleared

bit 7

SMP: SPI Data Input Sample bit
SPI Master mode:
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
SPI Slave mode:
SMP must be cleared when SPI is used in Slave mode
In I

C 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: SPI Clock Edge Select bit (SPI mode only)
In SPI Master or Slave mode:
1 = Transmit occurs on transition from active to Idle clock state
0 = Transmit occurs on transition from Idle to active clock state
In I

C™ mode only:

1 = Enable input logic so that thresholds are compliant with SMbus specification
0 = Disable SMbus specific inputs

bit 5

D/A: Data/Address bit (I

C 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
(I

C mode only. This bit is cleared when the MSSPx module is disabled, 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
(I

C mode only. This bit is cleared when the MSSPx 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 (I

C 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 I

C Slave mode:

1 = Read
0 = Write
In I

C 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 MSSPx is in Idle mode.

bit 1

UA: Update Address bit (10-bit I

C mode only)

1 = Indicates that the user needs to update the address in the SSPxADD register
0 = Address does not need to be updated

bit 0

BF: Buffer Full Status bit
Receive (SPI and I

C modes):

1 = Receive complete, SSPxBUF is full
0 = Receive not complete, SSPxBUF is empty
Transmit (I

C mode only):

1 = Data transmit in progress (does not include the ACK and Stop bits), SSPxBUF is full
0 = Data transmit complete (does not include the ACK and Stop bits), SSPxBUF is empty