PIC16C72-04SLASHSP datasheet(40/124 Pages) MICROCHIP

40 / 124 page

PIC16C72 Series

DS39016A-page 40

Preliminary

8.2

SPI Mode for PIC16C72

This section contains register deﬁnitions and opera-

tional characteristics of the SPI module on the

PIC16C72 device only.

Additional information on SPI operation may be found

in the PICmicro™ Mid-Range MCU Reference Manual,

DS33023.

FIGURE 8-1:

SSPSTAT: SYNC SERIAL PORT STATUS REGISTER (ADDRESS 94h) (PIC16C72)

U-0

R-0

—

D/A

R/W

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as ‘0’

- n =Value at POR reset

bit7

bit0

bit 7-6:

Unimplemented: Read as '0'

bit 5:

D/A: Data/Address bit (I2C 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 (I2C mode only. This bit is cleared when the SSP 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 (I2C mode only. This bit is cleared when the SSP 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 (I2C mode only)

This bit holds the R/W bit information following the last address match. This bit is valid from the address

match to the next start bit, stop bit, or ACK bit.

1 = Read

0 = Write

bit 1:

UA: Update Address (10-bit I2C 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

Receive (SPI and I2C modes)

1 = Receive complete, SSPBUF is full

0 = Receive not complete, SSPBUF is empty

Transmit (I2C mode only)

1 = Transmit in progress, SSPBUF is full

0 = Transmit complete, SSPBUF is empty

PIC16C72-04/SP Datasheet(PDF) 40 Page - Microchip Technology

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