參數(shù)資料
型號(hào)： AL251
廠商： Electronic Theatre Controls, Inc.
英文描述： Video Scan Doubler
中文描述： 視頻掃描倍增器
文件頁數(shù)： 17/33頁
文件大小： 595K
代理商： AL251
AL250
July 28, 1999
17
The read/write command format is as follows:
Write
: <S> <Write SA> <A> <Register Index> <A> <Data> <A> <P>
Read
: <S> <Write SA> <A> <Register Index> <A> <S> <Read SA> <A> <Data> <NA> <P>
Following are the details:
<
S
>:
Start signal
SCL
High
High
The Start signal is HIGH to LOW transition on
the SDA line when SCL is HIGH.
<
WRITE SA
>:
Write Slave Address: 58h or 5Ch
<
READ SA
>:
Read Slave Address: 59h or 5Dh
<
REGISTER INDEX
>:
Value of the AL250/251 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 AL250/251 (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 (HIGH) during the acknowledge clock pulse,
but the AL250/251 does not pull it down during
this stage.
SDA
High
Low
<
DATA
>:
Data byte write to or read from the register index.
In read operation, the host must release the SDA line (high) before the first clock pulse is
transmitted to the AL250.
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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