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BU2090FS-E2 データシート(PDF) 6 Page - Rohm

部品番号 BU2090FS-E2
部品情報  Serial / Parallel 2-input Drivers
Download  13 Pages
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メーカー  ROHM [Rohm]
ホームページ  http://www.rohm.com
Logo ROHM - Rohm

BU2090FS-E2 データシート(HTML) 6 Page - Rohm

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BU2098F, BU2090F, BU2090FS
Technical Note
6/12
www.rohm.com
2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
Function
Start condition
The start condition is a “HIGH” to “LOW” transition of the SDA line while SCL is “HIGH”.
Stop condition
The stop condition is a “LOW” to “HIGH” transition of the SDA line while SCL is “HIGH”.
Fig.2 Start / Stop condition
Acknowledge
The master (μp) puts a resistive “HIGH” level on the SDA line during the acknowledge clock pulse. The peripheral (audio
processor) that acknowledge has to pull-down (“LOW”) the SDA line during the acknowledge clock pulse, so that the SDA
line is stable “LOW” during this clock pulse.
The slave which has been addressed has to generate an acknowledgement after the reception of each byte, otherwise the
SDA line remains at the “HIGH” level during the ninth clock pulse time. In this case the master transmitter can generate the
STOP information in order to abort the transfer.
Fig.3 Acknowledge
SDA
SCL
S
Start
condition
P
Stop
condition
9
8
1
SCL
(from master)
SDA
(from master)
SDA
(from slave)
S
not confirm
ACK signal
confirm
clock for acknowledge


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