AN2511 datasheet(1/43 Pages) STMICROELECTRONICS

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AN2511 Datasheet(PDF) 1 Page - STMicroelectronics

Part #	AN2511

Description	This application note describes

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 43 page

August 2010

Doc ID 13286 Rev 2

1/43

AN2511

Application note

PMBusTM interface using ST7 I2C

Introduction

The PMBusTM (power management bus) is an open standard protocol that defines a means

of communicating with power conversion and other devices. The PMBus protocol helps to

establish the first truly open communications standard for the digital control of power

systems. Implemented over the industry-standard SMBus (system management bus) serial

interface, the PMBus protocol facilitates the programming, control and real-time monitoring

of compliant power conversion products.

This application note describes how to use the ST7 I2C peripheral for PMBus

communication. The firmware of this application performs the PMBus bus protocols

mentioned in PMBusTM power system management protocol specification v1.0. The device

chosen here is ST72264G1 which has multi-master I2C capability. This microcontroller acts

as the PMBus master. It controls the PMBus compatible slaves. The firmware described in

this application note is in C language.

To show the PMBus capabilities of ST7, a dedicated demonstration board is developed. This

board consists of the ST72F264G1 microcontroller and it works with PC hyperterminal. The

objective of this demonstration board is to show to the user the features and capabilities of

PMBus features using ST7 I2C peripheral, to support the standard PMBus commands. The

results of this demonstration board interfaced with Artesyn's PMBus module are shown in

this application note.

www.st.com

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