PCA9500D datasheet(11/21 Pages) PHILIPS

Part #	PCA9500D

Description	8-bit I2C and SMBus I/O port with 2-kbit EEPROM

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product data sheet

PCA9500

8-bit I2C and SMBus I/O port with 2-kbit EEPROM

2004 Sep 30

11

TYPICAL APPLICATION

Applications

• Board version tracking and configuration

• Board health monitoring and status reporting

• Multi-card systems in Telecom, Networking, and Base Station

Infrastructure Equipment

• Field recall and troubleshooting functions for installed boards

• General-purpose integrated I/O with memory

• Drop in replacement for PCF8574 with integrated 2-kbit EEPROM

• Bus master sees GPIO and EEPROM as two separate devices

• Three hardware address pins allow up to 8 PCA9500s to be

located in the same I2C/SMBus

CONTROL

EEPROM

GPIO

I2C

ASIC

CPU

OR

µC

I2C

MONITORING

AND

CONTROL

INPUTS

ALARM

LEDs

PCA9500

CARD ID, SUBROUTINES, CONFIGURATION DATA, OR REVISION HISTORY

SW02003

UP TO 8 CARDS

CONFIGURATION CONTROL

I2C

Figure 18. Typical application

A central processor/controller typically located on the system main

board can use the 400 kHz I2C/SMBus to poll the PCA9500 devices

located on the system cards for status or version control type of

information. The PCA9500 may be programmed at manufacturing to

store information regarding board build, firmware version,

manufacturer identification, configuration option data

… Alternately,

these devices can be used as convenient interface for board

configuration, thereby utilizing the I2C/SMBus as an intra-system

communication bus.

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PCA9500D Datasheet(PDF) 11 Page - NXP Semiconductors

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