DSPIC33FJ12MC02ESS datasheet(176/284 Pages) MICROCHIP

tên linh kiện	DSPIC33FJ12MC02ESS

Giải thích chi tiết về linh kiện	High-Performance, 16-Bit Digital Signal Controllers

PDF	284 Pages

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nhà sản xuất	MICROCHIP [Microchip Technology]

Trang chủ	http://www.microchip.com

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176 / 284 page

dsPIC33FJ12MC201/202

DS70265B-page 174

Preliminary

16.5

SPI Setup: Slave Mode

To set up the SPI module for the Slave mode of operation:

Clear the SPIxBUF register.

If using interrupts:

Clear the SPIxIF bit in the respective IFSn

Set the SPIxIE bit in the respective IECn

Write the SPIxIP bits in the respective IPCn

Write the desired settings to the SPIxCON1 and

SPIxCON2

registers

with

MSTEN

(SPIxCON1<5>) = 0.

Clear the SMP bit.

If the CKE bit is set, then set the SSEN bit

(SPIxCON1<7>) to enable the SSx pin.

Clear the SPIROV bit (SPIxSTAT<6>).

Enable SPI operation by setting the SPIEN bit

(SPIxSTAT<15>).

The SPI module generates an interrupt indicating

completion of a byte or word transfer, as well as a

separate interrupt for all SPI error conditions.

FIGURE 16-1:

SPI MODULE BLOCK DIAGRAM

Internal Data Bus

SDIx

SDOx

SSx

SCKx

SPIxSR

bit 0

Shift Control

Edge

Select

FCY

Primary

1:1/4/16/64

Enable

Prescaler

Sync

SPIxBUF

Control

Transfer

Write SPIxBUF

Read SPIxBUF

SPIxCON1<1:0>

SPIxCON1<4:2>

Master Clock

Clock

Control

Secondary

Prescaler

1:1 to 1:8

SPIxRXB

SPIxTXB

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