PT2258(2000) 查看數據表（PDF） - Princeton Technology

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PT2258
(Rev.:2000)

6-Channel Electronic Volume Controller IC

Princeton Technology 

Princeton Technology Corp.

Tel : 886-2-29162151

Fax: 886-2-29174598

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

6-Channel Electronic Volume Controller IC Preliminary

PT2258

FUNCTIONAL DESCRIPTION

Bus Interface

Data are transmitted to and from the microprocessor to the PT2258 via the SDA and SCL. The SDA

and SCL make up the BUS Interface. It should be noted that the pull-up resistors must be connected to

the positive supply voltage.

Data Validity

A data on the SDA Line is considered valid and stable only when the SCL Signal is in HIGH State.

The HIGH and LOW States of the SDA Line can only change when the SCL signal is LOW. Please

refer to the figure below.

SDA

SCL

Start and Stop Conditions

A Start Condition is activated when 1) the SCL is set to HIGH and 2) SDA shifts from HIGH to LOW

State. The Stop Condition is activated when 1) SCL is set to HIGH and 2) SDA shifts from LOW to

HIGH State. Please refer to the timing diagram below.

SCL

SDA

PT2258 pre1.0

5

Updated July 2000

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