PT2259 查看數據表（PDF） - Princeton Technology

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PT2259

Volume Controller IC

Princeton Technology 

Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

Volume Controller IC

PT2259

FUNCTIONAL DESCRIPTION

I2C BUS INTERFACE

In PT2259 the DATA and CLK make up the bus interface through which data is transmitted to and from

the microprocessor.

DATA VALIDITY

Data on the DATA line is considered valid and stable only when the CLK signal is in the “high” state. In

addition, the “high” and “low” states of the DATA line can change only when the CLK signal is in the

“low” state. Please refer to the diagram below:

START AND STOP CONDITIONS

A start condition is activated when:

1. the CLK signal is set to “high”, and

2. the DATA signal shifts from “high” to “low”

A stop condition is activated when:

1. the CLK signal is set to “high”, and

2. the DATA signal shifts from “low” to “high”

Please refer to the timing diagram below:

PT2259 V1.2

-4-

June, 2005

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