PIC18C658T-ESLASHCL datasheet(136/366 Pages) MICROCHIP

136 / 366 page

PIC18CXX8

DS30475A-page 136

Advanced Information

 2000 Microchip Technology Inc.

15.2

Control Registers

The MSSP module has three associated registers.

These include a status register and two control registers.

(SSPSTAT), Register 15-2 shows the MSSP Control

MSSP Control Register 2 (SSPCON2).

SSPSTAT REGISTER

R/W-0

R-0

SMP

CKE

D/A

R/W

bit 7

bit 0

bit 7

SMP: Sample bit

SPI Master mode

= Input data sampled at end of data output time

= 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:

= 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: SPI Clock Edge Select

CKP = 0

= Data transmitted on rising edge of SCK

= Data transmitted on falling edge of SCK

CKP = 1

= Data transmitted on falling edge of SCK

= Data transmitted on rising edge of SCK

bit 5

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

= 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

(I2C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)

= Indicates that a STOP bit has been detected last (this bit is ’0’ on RESET)

= STOP bit was not detected last

bit 3

S: START bit

(I2C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)

= 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 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 not ACK bit.

In I2C Slave mode:

= Read

= Write

In I2C Master mode:

= Transmit is in progress

= Transmit is not in progress

OR-ing this bit with SEN, RSEN, PEN, RCEN, or ACKEN will indicate if the MSSP is in

IDLE mode.

PIC18C658T-E/CL Datasheet(PDF) 136 Page - Microchip Technology

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