Implementation of a Multi-Slave SPI Bus Using the SSIO Port of Oki Advantage Microcontrollers
App Note
 

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Description

Serial Peripheral Interface(SPI) is a popular and flexible method of serial communication that is frequently used in embedded systems. SPI requires few I/O lines and it is fast and efficient. The Oki ML674001/2/3 and ML675001 series of ARM®-based MCUs are equipped with a Synchronous Serial I/O (SSIO) controller that provides efficient communications with SPI compatible devices.

This Application Note describes how to use the ML674001/2/3 and ML675001 MCU's SSIO port to interface with two or more SPI-enabled peripherals. The peripherals used for this example are SPI-EEPROMs. This Application Note defines the hardware and software implementation for this system. Software samples written in C are available as examples and building blocks for user applications.

Overview of Oki Advantage Microcontrollers

Oki Advantage Microcontrollers are a powerful and growing family of ARM-based MCUs that deliver the flexibility and advanced features of 32-bit MCUs at 16-bit MCU prices. Advantage Microcontrollers offer numerous embedded peripheral controllers combined with on-chip SRAM and various densities of on-chip flash.

By offering a de-facto standard 32-bit processor core architecture, advantage ARM based microcontrollers help to ease product development by having a variety of high-quality development tools, an excellent on-chip debug architecture (embeddedICE), and great support infrastructure that provide RTOS' and application software. This support infrastructure shortens time to market and improves productivity.

Advantage Microcontrollers offer a range of products with a selection of flash densities, a choice of operating frequencies, and a choice of internal cache. The pin compatibility feature of these MCUs gives designers flexibility in their designs by allowing them to use MCUs with various performance capability and memory densities on the same design.

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