msm7652 Oki Semiconductor, msm7652 Datasheet - Page 29

• Manufacturer Part Number: msm7652
• Description: Ntsc/pal Digital Video Encoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
I
Basic input format of I
As described above, it is possible to read and write data from subaddress to subaddress
continuously. Reading from and writing to discontinuous addresses is performed by repeating
the Acknowledge and Stop condition formats after Data 0.
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 : 1/write : 0 control bit).
The input timing is shown below.
2
SDA
S
SCL
C BUS FORMAT
S
Slave Address
A
Subaddress
Data n
P
Slave Address
Start Condition
Symbol
Data Line Stable: Data Valid
S
MSB
1
A
2
C-bus interface is shown below.
2
Start condition
Slave address 1000100X (ADRS pin : 0) or 1000110X (ADRS pin : 1),
the 8th bit is R (1)/W (0) signal.
Acknowledge. Generated by slave
Subaddress byte
Data byte and acknowledge continues until data byte stop condition is met.
Stop condition
Subaddress
Change of Data Allowed
I
2
C-bus Basic Input/Output Timing
7
A
8
t
C_SCL
Data 0
ACK
9
Description
t
L_SCL
1
A
2
t
H_SCL
.....
3-8
ACK
Data n
9
MSM7652
Stop Condition
P
A P
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