MEC1322 Datasheet, PDF (308/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
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
Host Interface
General Purpose Serial
Peripheral Interface
Signal Description
Power, Clocks and Reset
Interrupts
DS00001719D-page 308
 2014 - 2015 Microchip Technology Inc.