Specifications

PowerCassette
®
: I2C SERIAL BUS INTERFACE FOR PCM/TPCM
Status Indication of system critical power supply parameters
Industry Standard Communication Interface
Inventory Control Information
Status Indication
Management of System Load
Imminent Failure Warning
Fully Integrated with Standard PSU Package
FEATURES
PCM Series
(Chassis Mount)
TPCM Series
(Hot-Swap)
DESCRIPTION
1U HIGH
1.6” x 5” x 10”
(41 x 127 x 254 mm)
www.unipowercorp.com
The I2C interface that is incorporated into the PowerCassette includes facilities to monitor various operating
parameters within the unit and transmit these to a host computer on demand over an industry standard I2C
Serial bus.
Three forms of data are available. These allow the user to monitor the actual status of an individual unit,
manage system loading through measurement of the actual load on the output and also control inventory
through an inbuilt EEPROM containing specific data about each individual unit.
The implementation of I2C that has been utilized in PowerCassette is a subset of more complete implementa-
tions such as IPMI. This data-sheet is intended as a supplement to the data sheet for the PowerCassette
family itself and should provide enough information for the system designer to make decisions on how to
utilize the available information within his overall system philosophy.
I2C DEVICES EMPLOYED
PCF8574
This device is an 8-bit digital register manufactured by Philips.
PCF8591
This device is a Quad A/D converter manufactured by Philips.
24C02
This device is a 256 byte EEPROM manufactured by ST
MAX6633
This is a 12-bit temperature measurement device manufactured
by Maxim.
For detailed information about the operation of these devices please consult the original manufacturers’ data-sheets.
CORPORATION
North America: 954-346-2442 • [e-mail]
Europe: [phone] • [e-mail]
© 2002 UNIPOWER Corporation pcmi2c.p65 - rev b - 12/3/02