MEC1322 datasheet(308/456 Pages) MICROCHIP

308 / 456 page

MEC1322

DS00001719D-page 308

 2014 - 2015 Microchip Technology Inc.

27.0 GENERAL PURPOSE SERIAL PERIPHERAL INTERFACE

27.1

Overview

The General Purpose Serial Peripheral Interface (GP-SPI) may be used to communicate with various peripheral

devices, e.g., EEPROMS, DACs, ADCs, that use a standard Serial Peripheral Interface.

Characteristics of the GP-SPI Controller include:

• 8-bit serial data transmitted and received simultaneously over two data pins in Full Duplex mode with options to

transmit and receive data serially on one data pin in Half Duplex (Bidirectional) mode.

• An internal programmable clock generator and clock polarity and phase controls allowing communication with var-

ious SPI peripherals with specific clocking requirements.

• SPI cycle completion that can be determined by status polling or interrupts.

• The ability to read data in on both SPDIN and SPDOUT in parallel. This allows this SPI Interface to support dual

data rate read accesses for emerging double rate SPI flashes

• Support of back-to-back reads and writes without clock stretching, provided the host can read and write the data

registers within one byte transaction time.

27.2

References

No references have been cited for this feature.

27.3

Terminology

No terminology for this block.

27.4

Interface

This block is designed to be accessed externally via the pin interface and internally via a registered host interface.

FIGURE 27-1:

I/O DIAGRAM OF BLOCK

General Purpose Serial

Peripheral Interface

Interrupts

Power, Clocks and Reset

Host Interface

Signal Description

MEC1322 Datasheet(PDF) 308 Page - Microchip Technology