msm7650 Oki Semiconductor, msm7650 Datasheet - Page 28

• Manufacturer Part Number: msm7650
• Description: Ntsc/pal Digital Encoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
I
Basic input format of I
It is required to input the above-mentioned format from the start condition to the stop condition
each time of writing a subaddress.
For example, when writing the subaddresses 0 to 2, the format should be input three times.
In case data of more than one byte are transferred,
The 4th byte data and following data each are written over the same subaddress.
If one of the following matters occurs, the encoder will not return "A" (Acknowledge).
• The slave address does not match.
• A non-existent subaddress is specified.
• The read/write attribute of a register does not match "X" (read/write control bit).
The input timing is shown below.
SDA
SCL
2
S
S
C BUS FORMAT
S
Slave Address
A
Subaddress
Data n
P
Slave Address
Slave Address
Start Condition
Symbol
S
1
2
Slave Address
A
A
2
C-bus interface is shown below.
S
Start condition
Slave address 1000100 or 1000000, 8th bit is write signal.
Acknowledge. Generated by slave
Subaddress byte
Data byte and acknowledge continues until data byte stop condition is met.
Stop condition
Subaddress0
Subaddress0
8
1 cycle
Slave Address
ACK
1
A
A
2
A
Sub Address
Data 0
Data 0
Subaddress1
Description
8
ACK
A P
A P
1
A
2
Data
Data 1
Data n
8
Stop Condition
ACK
MSM7650
A P .....
P
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A P