Microchip Technology MA320002 Data Sheet

© 2011 Microchip Technology Inc.

DS61143H-page 111

SERIAL PERIPHERAL 
INTERFACE (SPI) 

The SPI module is a synchronous serial interface use-
ful for communicating with external peripherals and
other microcontroller devices. These peripheral
devices may be Serial EEPROMs, shift registers, dis-
play drivers, Analog-to-Digital Converters, etc. The
PIC32MX SPI module is compatible with Motorola

®

 SPI

and SIOP interfaces. 

Following are some of the key features of this module:

• Master and Slave Modes Support

• Four Different Clock Formats

• Framed SPI Protocol Support

• User Configurable 8-bit, 16-bit and 32-bit Data 

Width

• Separate SPI Data Registers for Receive and 

Transmit

• Programmable Interrupt Event on every 8-bit, 

16-bit and 32-bit Data Transfer

• Operation during CPU Sleep and Idle Mode

• Fast Bit Manipulation using CLR, SET and INV 

Registers

Note 1: This data sheet summarizes the features

of the PIC32MX3XX/4XX family of
devices. It is not intended to be a compre-
hensive reference source. To comple-
ment the information in this data sheet,
refer to Section 23. “Serial Peripheral
Interface (SPI)” (DS61106) of the
“PIC32 Family Reference Manual”, which
is available from the Microchip web site
(

www.microchip.com/PIC32

).

2: Some registers and associated bits

described in this section may not be
available on all devices. Refer to

 in

this data sheet for device-specific register
and bit information.

Internal

Data Bus

SDIx

SDOx

SSx/F

SYNC

SCKx

SPIxSR

bit 0

Shift

Control

Edge

Select

Enable Master Clock

Baud Rate

Slave Select

 Sync Control

Clock

Control

Transmit

SPIxRXB

Receive

 and Frame

Note: Access SPIxTXB and SPIxRXB registers via SPIxBUF register.

Registers share address SPIxBUF

SPIxTXB

SPIxBUF

Generator

PBCLK

Write

Read