DSPIC33FJ06GS201TESLASHMM datasheet(219/346 Pages) MICROCHIP

219 / 346 page

Preliminary

DS70318D-page 217

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

16.0

SERIAL PERIPHERAL

INTERFACE (SPI)

The Serial Peripheral Interface (SPI) module is a

synchronous serial interface useful for communicating

with other peripheral or microcontroller devices. These

peripheral devices can be serial EEPROMs, shift

registers, display drivers, analog-to-digital converters

and so on. The SPI module is compatible with SPI and

SIOP from Motorola®.

The SPI module consists of a 16-bit shift register,

SPIxSR (where x = 1), used for shifting data in and out,

and a buffer register, SPIxBUF. A control register,

SPIxCON, configures the module. Additionally, a status

The serial interface consists of the following four pins:

• SDIx (Serial Data Input)

• SDOx (Serial Data Output)

• SCKx (Shift Clock Input Or Output)

• SSx (Active-Low Slave Select).

In Master mode operation, SCK is a clock output; in

Slave mode, it is a clock input.

FIGURE 16-1:

SPI MODULE BLOCK DIAGRAM

Note:

This data sheet summarizes the features

the

dsPIC33FJ06GS101/X02

and

dsPIC33FJ16GSX02/X04

families

devices. It is not intended to be a

comprehensive reference source. To

complement the information in this data

sheet, refer to the “dsPIC33F Family

Reference Manual”

, Section 18. “Serial

Peripheral Interface (SPI)”

(DS70206),

which is available on the Microchip

web site (www.microchip.com).

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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