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

Interface Protocol

The interface protocol consists of the following:

· A Start Condition

· A Chip Address Byte including the PT2258 address. The 8th Bit of the Byte must be “0”. PT2258

must always acknowledge the end of each transmitted byte.

· A Data Sequence (N-Bytes + Acknowledge)

· A Stop Condition

Please refer to the diagram below:

PT2258 Address

Software Specification

PT2258 ADDRESS CODE

PT2258 Address Code depends on the state of CODE1 (Pin No. 17) and CODE2 (Pin No.4). If CODE1

or CODE2 is connected to Vcc, then CODE1 or CODE2 is set to “1”. If CODE1 or CODE2 is con-

nected to the Ground, it is set to “0”. Please refer to the information below:

Condition 1: When CODE1=”1” and CODE2=”1”:

CODE1 CODE2

1

1

Then, the PT2258 Address Code is (8CH):

1

00

01

1

0

0

MSB

LSB

PT2258 pre1.0

7

Updated July 2000

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