AL250 International Power Sources, Inc., AL250 Datasheet - Page 18

• Manufacturer Part Number: AL250
• Description: Video Scan Doubler
• Manufacturer: International Power Sources, Inc.

Suppose data F0h is to be written to register 0Fh using write slave address 58h, the timing is as
follows:
Suppose data is to be read from register 55h using read slave address 59h, the timing is as follows:
SDA
6.9 Video Decoding
A video decoder (video input processor) is needed with the AL250/251 for S-video or composite
video processing. Please note that the AL250/251 works only with line-locked video decoders.
There are a number of video decoders available in the market; following is a selection chart. For
detailed information, please consult with the decoder vendors or their distributors directly.
attached information is believed to be accurate but not guaranteed.
SCL
<P>:
Stop signal
SCL SDA
High Low
High High
The Stop signal is LOW to HIGH transition on the SDA line when SCL is HIGH.
SDA
SCL
Start
Slave addr = 58h
Start
Slave addr = 58h
Ack
Index = 55h
Ack
AL250-24 I2C Write timing
Index = 0Fh
Ack
AL250-25 I2C Read timing
Stop
Start
Ack
Read slave addr = 59h
Data = F0h
Ack Stop
Ack
Data read cycle
July 28, 1999
NAck
AL250
The
18
Stop