Microchip Technology TDGL019 Data Sheet

© 2011-2014 Microchip Technology Inc.

DS60001168F-page 165

The SPI module is a synchronous serial interface that
is useful for communicating with external peripherals
and other microcontrollers. These peripheral devices
may be Serial EEPROMs, Shift registers, display driv-
ers, 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 mode and Slave mode support
• Four 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 Sleep and Idle modes
• Audio Codec Support:

- I

2

S protocol

- Left-justified
- Right-justified
- PCM

This data sheet summarizes the
features of the PIC32MX1XX/2XX 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”

www.microchip.com/PIC32

).

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

 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