PIC24FJ128GA310 datasheet(222/406 Pages) MICROCHIP

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PIC24FJ128GA310 FAMILY

DS39996F-page 222

 2010-2011 Microchip Technology Inc.

To set up the SPI module for the Standard Master mode

of operation:

If using interrupts:

Clear the SPIxIF bit in the respective IFS

Set the SPIxIE bit in the respective IEC

Write the SPIxIP bits in the respective IPC

Write the desired settings to the SPIxCON1

and

SPIxCON2

registers

with

MSTEN

(SPIxCON1<5>) = 1.

Clear the SPIROV bit (SPIxSTAT<6>).

Enable SPI operation by setting the SPIEN bit

(SPIxSTAT<15>).

Write the data to be transmitted to the SPIxBUF

as soon as data is written to the SPIxBUF

To set up the SPI module for the Standard Slave mode

of operation:

Clear the SPIxBUF register.

If using interrupts:

a) Clear the SPIxIF bit in the respective IFS

b) Set the SPIxIE bit in the respective IEC

Write the SPIxIP bits in the respective IPC

Write the desired settings to the SPIxCON1

and

SPIxCON2

registers

with

MSTEN

(SPIxCON1<5>) = 0.

Clear the SMP bit.

If the CKE bit (SPIxCON1<8>) is set, then the

SSEN bit (SPIxCON1<7>) must be set to enable

the SSx pin.

Clear the SPIROV bit (SPIxSTAT<6>).

Enable SPI operation by setting the SPIEN bit

(SPIxSTAT<15>).

FIGURE 16-1:

SPIx MODULE BLOCK DIAGRAM (STANDARD MODE)

Internal Data Bus

SDIx

SDOx

SSx/FSYNCx

SCKx

SPIxSR

bit 0

Shift Control

Edge

Select

Primary

1:1/4/16/64

Enable

Prescaler

Sync

Clock

Control

SPIxBUF

Control

Transfer

Write SPIxBUF

Read SPIxBUF

SPIxCON1<1:0>

SPIxCON1<4:2>

Master Clock

Secondary

Prescaler

1:1 to 1:8

FCY

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