PT2257-SL datasheet(7/20 Pages) PTC

Part #	PT2257-SL

Description	Electronic Volume Controller IC

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Manufacturer	PTC [Princeton Technology Corp]

Direct Link	http://www.princeton.com.tw

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Tel: 886-2-66296288

Fax: 886-2-29174598

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

PT2257 V1.3

- 7 -

December, 2006

Electronic Volume Controller IC

PT2257

SOFTWARE SPECIFICATION

PT2257 ADDRESS

PT2257 Address is shown below:

1

MSB

0

1

0

LSB

I2C BUS INTERFACE START TIME

After Power is turned ON, PT2257 needs to wait for a short time in order to insure stability. The waiting

time period for PT2257 to send I2C Bus Signal is at least 200ms. If the waiting time period is less than

200ms, I2C Control may fail. Please refer to the diagram below.

POWER ON

VDD

SDA/SCL

V

90% VDD

At least 200ms

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