STEVAL-ISQ006V1 Datasheet, PDF (1/5 Pages) STMicroelectronics – USB to PMBus bridge demonstration board based on the ST72F651

STEVAL-ISQ006V1
Features
USB to PMBus bridge demonstration board
based on the ST72F651
Data Brief
■ USB to PMBus bridge
■ Packaged hardware board (mechanical size:
79 mm x 39 mm x 20 mm) with a USB
connector
■ User friendly graphical user interface (GUI) to
– identify the connected PMBus slaves (up to
four)
– configure, control and monitor the
connected slaves
– write/ read different PMBus commands
– poll the alert response
STEVAL-ISQ006V1
Description
The power management bus (PMBus) is a variant
of the system management bus (SMBus) which is
targeted at digital management of power supplies.
Like SMBus, it is a relatively slow speed two wire
communications protocol based on I²C. The
PMBus protocol helps to establish the first truly
open communications standard for the digital
control of power systems facilitating the
programming, control and real-time monitoring of
compliant power conversion products.
The objective of this demonstration board is to
show to the user the features and capabilities of
PMBus using ST7 I2C peripheral, to support the
standard PMBus commands.
This demonstration board has ST72651AR6
Microcontroller (MCU) that has an I2C peripheral.
This microcontroller acts as the PMBus master.
This demonstration board works with PC GUI and
controls one or more PMBus compatible slaves
connected on the shared bus. Even though its
main purpose is to interface with ST PMBus
devices (PM881x), it could be used to interface
with other devices making use of the supported
set of command.
The firmware of this application performs the
PMBus bus protocols mentioned in PMBus™
power system management protocol specification
v1.1. The firmware is in C language.
November 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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