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參數(shù)資料
| 型號： | AL128 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:55; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| 中文描述： | 即插即用VGA到的NTSC / PAL制式轉(zhuǎn)換器 |
| 文件頁數(shù)： | 23/45頁 |
| 文件大?。?/td> | 498K |
| 代理商： | AL128 |
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AL128
April 2, 1999
23
6.13 I
2
C Programming
The AL100/110/128 I
2
C programming interface is slightly different from the Philips standard (same
write cycles but different read cycles). The I
2
C interface consists of the SCL (clock) and SDA (data)
signals. Data can be written to or read from the AL100/110/128. For both read and write, each byte
is transferred MSB first, and the SDA data bit is valid when the SCL is pulled high.
The read/write command format is as follows:
Write
: <S> <Write SA> <A> <Register Index> <A> <Data> <A> <P>
Read
: <S> <Read SA> <A> <Register Index> <A> <Data> <NA> <P>
Following are the details:
<
S
>:
Start signal
SCL SDA
High High
High Low
The Start signal is HIGH to LOW transition on the
SDA line when SCL is HIGH.
<
WRITE SA
>:
Write Slave Address: 88h or 8Ch
<READ SA
>:
Read Slave Address: 89h or 8Dh
<
REGISTER INDEX
>:
Value of the AL100/110/128 register index.
<
A
>:
Acknowledge stage
The acknowledge-related clock pulse is generated by
the host (master). The host releases the SDA line
(HIGH) for the AL100/110/128 (slave) to pull down
the SDA line during the acknowledge clock pulse.
<
NA
>:
Not Acknowledge stage
The acknowledge-related clock pulse is generated by
the host (master). The host releases the SDA line
SCL
SDA
SDA
SCL
SDA
SCL
SCL
SDA
SCL
Data bit [1] or NA
Data bit [0] or A
START bit [S]
STOP bit [P]
Not significant
AL250-15 I2C drawing
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