PIC18F44J10-ESLASHML datasheet(149/358 Pages) MICROCHIP

149 / 358 page

Preliminary

DS39682C-page 147

PIC18F45J10 FAMILY

SSPxCON1: MSSPx CONTROL REGISTER 1 (SPI™ MODE)

R/W-0

WCOL

SSPOV

SSPEN

CKP

SSPM3

SSPM2

SSPM1

SSPM0

bit 7

bit 0

bit 7

WCOL: Write Collision Detect bit (Transmit mode only)

= The SSPxBUF register is written while it is still transmitting the previous word

(must be cleared in software)

= No collision

bit 6

SSPOV: Receive Overflow Indicator bit

SPI Slave mode:

= A new byte is received while the SSPxBUF register is still holding the previous data. In case

of overflow, the data in SSPxSR is lost. Overflow can only occur in Slave mode. The user

must read the SSPxBUF, even if only transmitting data, to avoid setting overflow (must be

cleared in software).

= No overflow

Note:

In Master mode, the overflow bit is not set since each new reception (and

transmission) is initiated by writing to the SSPxBUF register.

bit 5

SSPEN: Master Synchronous Serial Port Enable bit

= Enables serial port and configures SCKx, SDOx, SDIx and SSx as serial port pins

= Disables serial port and configures these pins as I/O port pins

Note:

When enabled, these pins must be properly configured as input or output.

bit 4

CKP: Clock Polarity Select bit

= Idle state for clock is a high level

= Idle state for clock is a low level

bit 3-0

SSPM3:SSPM0: Master Synchronous Serial Port Mode Select bits

0101

= SPI Slave mode, clock = SCKx pin, SSx pin control disabled, SSx can be used as I/O pin

0100

= SPI Slave mode, clock = SCKx pin, SSx pin control enabled

0011

= SPI Master mode, clock = TMR2 output/2

0010

= SPI Master mode, clock = FOSC/64

0001

= SPI Master mode, clock = FOSC/16

0000

= SPI Master mode, clock = FOSC/4

Note:

Bit combinations not specifically listed here are either reserved or implemented in

I2C mode only.

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

PIC18F44J10-E/ML 데이터시트(PDF) 149 Page - Microchip Technology

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