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

VDD

VDD

10 kΩ

SCL

MASTER

CONTROLLER

SDA

GND

10 kΩ

10 kΩ

(optional)

VDD

SCL

I/00

SDA

I/01

I/02

I/03

PCA9500

I/04

I/05

A2

I/06

A1

I/07

A0

VSS

NOTE: GPIO device address configured as 0100100 for this example

EEPROM device address configured as 1010100 for this example

I/00, I/02, I/03, configured as outputs

I/01, I/04, I/05, configured as inputs

I/006, I/07, are not used and have to be configured as outputs

Figure 19. Typical application

2 kΩ

SUBSYSTEM 1

(e.g. temp sensor)

INT

RESET

SUBSYSTEM 2

(e.g. counter)

A

ENABLE

Controlled Switch

(e.g. CBT device)

B

ALARM

SUBSYSTEM 3

(e.g. alarm

system)

VDD

SW01076

2004 Sep 30

12

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