參數(shù)資料
型號(hào)： PT2257-SL
廠商： Princeton Technology Corporation
英文描述： Electronic Volume Controller IC
中文描述： 電子音量控制IC
文件頁(yè)數(shù)： 5/20頁(yè)
文件大小： 360K
代理商： PT2257-SL
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Tel: 886-2-66296288
BYTE FORMAT
Every byte transmitted to the SDA Line consists of 8 bits. Each byte must be followed by an
Acknowledge Bit. The MSB is transmitted first.
ACKNOWLEDGE
During the Acknowledge Clock Pulse, the master (μP) puts a resistive HIGH level on the SDA Line.
The peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during the
Acknowledge Clock Pulse so that the SDA Line is in a Stable Low State during this Clock Pulse. Please
refer to the diagram below.
PT2257 V1.3
- 5 -
December, 2006
Electronic Volume Controller IC
PT2257
SDA
SCL
Start
MSB
Acknowledgment
from Receiver
1
2
3
7
8
9
4
The audio processor that has been addressed has to generate an Acknowledge after receiving each
byte; otherwise, the SDA Line will remain at the High Level during the ninth (9th) Clock Pulse. In this
case, the master transmitter can generate the STOP Information in order to abort the transfer.
TRANSMISSION WITHOUT ACKNOWLEDGE
If you want to avoid the acknowledge detection of the audio processor, a simpler μP transmission may
be used. Wait one clock and do not check the slave acknowledge of this same clock then send the new
data. If you use this approach, there are greater chances of faulty operation as well as decrease in
noise immunity.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PT2258 制造商:PTC 制造商全稱(chēng):Princeton Technology Corp 功能描述:6-Channel Electronic Volume Controller IC
PT2258_07 制造商:PTC 制造商全稱(chēng):Princeton Technology Corp 功能描述:6-Channel Electronic Volume Controller IC
PT2258L 制造商:PTC 制造商全稱(chēng):Princeton Technology Corp 功能描述:6-Channel Electronic Volume Controller IC
PT2258-S 制造商:PTC 制造商全稱(chēng):Princeton Technology Corp 功能描述:6-Channel Electronic Volume Controller IC
PT2258-SL 制造商:PTC 制造商全稱(chēng):Princeton Technology Corp 功能描述:6-Channel Electronic Volume Controller IC
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