PIC16F87 datasheet(88/230 Pages) MICROCHIP

88 / 230 page

PIC16F87/88

DS30487D-page 88

 2002-2013 Microchip Technology Inc.

SSPSTAT: SYNCHRONOUS SERIAL PORT STATUS REGISTER (ADDRESS 94h)

R/W-0

R-0

SMP

CKE

D/A

P(1)

S(1)

R/W

bit 7

bit 0

bit 7

SMP: SPI Data Input Sample Phase bit

SPI Master mode:

= Input data sampled at end of data output time

= Input data sampled at middle of data output time (Microwire)

SPI Slave mode:

This bit must be cleared when SPI is used in Slave mode.

I2C mode:

This bit must be maintained clear.

bit 6

CKE: SPI Clock Edge Select bit

= Transmit occurs on transition from active to Idle clock state

= Transmit occurs on transition from Idle to active clock state

Note:

Polarity of clock state is set by the CKP bit (SSPCON<4>).

bit 5

D/A: Data/Address bit (I2C mode only)

In I2C Slave mode:

= Indicates that the last byte received was data

= Indicates that the last byte received was address

bit 4

P: Stop bit(1) (I2C mode only)

= Indicates that a Stop bit has been detected last

= Stop bit was not detected last

bit 3

S: Start bit(1) (I2C mode only)

= Indicates that a Start bit has been detected last (this bit is ‘0’ on Reset)

= Start bit was not detected last

bit 2

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

Holds the R/W bit information following the last address match and is only valid from address

match to the next Start bit, Stop bit or ACK bit.

=Read

= Write

bit 1

UA: Update Address bit (10-bit I2C 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

Receive (SPI and I2C modes):

= Receive complete, SSPBUF is full

= Receive not complete, SSPBUF is empty

Transmit (in I2C mode only):

= Transmit in progress, SSPBUF is full (8 bits)

= Transmit complete, SSPBUF is empty

Note 1: This bit is cleared when the SSP module is disabled (i.e., the SSPEN bit is cleared).

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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