Microchip Technology DV320032 Data Sheet

 2012-2013 Microchip Technology Inc.

DS60001185C-page  193

The SPI module is a synchronous serial interface that 
is useful 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 (ADC), etc. 
The PIC32 SPI module is compatible with Motorola

®

SPI and SIOP interfaces. 
Some of the key features of the SPI module are:
• Master and Slave modes support
• Four different clock formats
• Enhanced Framed SPI protocol support
• User-configurable 8-bit, 16-bit and 32-bit data width
• Separate SPI FIFO buffers for receive and transmit

- FIFO buffers act as 4/8/16-level deep FIFOs 

based on 32/16/8-bit data width

• Programmable interrupt event on every 8-bit, 



16-bit and 32-bit data transfer

• Operation during CPU Sleep and Idle mode
• Audio Codec Support:

- I

2

S protocol

- Left-justified
- Right-justified
- PCM

Note 1: This data sheet summarizes the 

features of the PIC32MX330/350/370/
430/450/470 family of devices. It is not 
intended to be a comprehensive 
reference source. To complement the 
information in this data sheet, refer to 
Section 23. “Serial Peripheral 
Interface (SPI)” (DS60001106) in 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

MSTEN

Baud Rate

Slave Select

 Sync Control

Clock

Control

Transmit

Receive

 and Frame

Note: Access SPIxTXB and SPIxRXB FIFOs via SPIxBUF register.

FIFOs Share Address SPIxBUF

SPIxBUF

Generator

PBCLK

Write

Read

SPIxTXB FIFO

SPIxRXB FIFO

REFCLK

MCLKSEL

1

0