DM385 datasheet(261/281 Pages) TI

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DM385, DM388

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SPRS821D – MARCH 2013 – REVISED DECEMBER 2013

8.17 Serial Peripheral Interface (SPI)

The SPI is a high-speed synchronous serial input/output port that allows a serial bit stream of programmed

length (4 to 32 bits) to be shifted into and out of the device at a programmed bit-transfer rate. The SPI is

normally used for communication between the device and external peripherals. Typical applications

include an interface-to-external I/O or peripheral expansion via devices such as shift registers, display

drivers, SPI EEPROMs, and Analog-to-Digital Converters (ADCs).

The SPI supports the following features:

•

Master/Slave operation

•

Four chip selects for interfacing/control to up to four SPI Slave devices and connection to a single

external Master

•

32-bit shift register

•

Buffered receive/transmit data register per channel (1 word deep), FIFO size is 64 bytes

•

Programmable SPI configuration per channel (clock definition, enable polarity and word width)

•

Supports one interrupt request and two DMA requests per channel.

For more detailed information on the SPI, see the Multichannel Serial Port Interface (McSPI) chapter in

the device-specific Technical Reference Manual.

8.17.1 SPI Peripheral Register Descriptions

The SPI peripheral registers are described in the device-specific Technical Reference Manual. Each

the peripherals are in the device memory map (see Section 2.10).

Peripheral Information and Timings

261

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DM385 Datasheet(PDF) 261 Page - Texas Instruments