PCA9500 查看數據表（PDF） - Philips Electronics

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PCA9500

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

Philips Electronics 

Philips Semiconductors

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

Product data sheet

PCA9500

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

UP TO 8 CARDS

• 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

I2C

I2C

CPU

OR

I2C

I2C

µC

I2C

ASIC

CONFIGURATION CONTROL

PCA9500

CONTROL

INPUTS

I2C

GPIO

ALARM

EEPROM

MONITORING

AND

CONTROL

LEDs

CARD ID, SUBROUTINES, CONFIGURATION DATA, OR REVISION HISTORY

Figure 18. Typical application

SW02003

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.

2004 Sep 30

11

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