PIC17C752 datasheet(124/320 Pages) MICROCHIP

124 / 320 page

PIC17C75X

DS30264A-page 124

Preliminary

FIGURE 15-4: SSPSTAT: SYNC SERIAL PORT STATUS REGISTER (ADDRESS: 13h, BANK 6)

R/W-0 R/W-0

R-0

SMP

CKE

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:

SMP: SPI data input sample phase

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 I2C 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 (Figure 15-8, Figure 15-11, and Figure 15-12)

CKP = 0

1 = Data transmitted on rising edge of SCK

0 = Data transmitted on falling edge of SCK

CKP = 1

1 = Data transmitted on falling edge of SCK

0 = Data transmitted on rising edge of SCK

bit 5:

D/A: Data/Address bit (I2C slave 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 only valid from the

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

In I2C slave mode:

1 = Read

0 = Write

In I2C master mode:

1 = Transmit is in progress

0 = Transmit is not in progress. Or’ing this bit with SAE, RCE, SPE, or AKE will indicate if the SSP is in

IDLE mode.

bit 1:

UA: Update Address (10-bit I2C 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

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 = Data Transmit in progress (does not include ACK and stop bits), SSPBUF is full

0 = Data Transmit complete (does not include ACK and stop bits), SSPBUF is empty

PIC17C752 Datasheet(PDF) 124 Page - Microchip Technology

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