sm5351af1 Seiko NPC Corp., sm5351af1 Datasheet - Page 15

• Manufacturer Part Number: sm5351af1
• Description: Audio Video Switch
• Manufacturer: Seiko NPC Corp.

FUNCTIONAL DESCRIPTION
I
The SM5351AF1 uses the I
1) Input switch select
2) Output mute settings
In addition, the interface is used to read the following status parameters:
3) Cable connecting status of each connector
4) S2 signal and D-terminal signals discriminate result
The transfer speed is compatible with fast mode (400kbit/s). The SM5351AF1 corresponds to the I
2.7V to 3.6V supply voltage. (It is independent on voltage of VDD pin.)
Basic Cycle
The write sequence is: SM5351AF1 slave address → specific control register sub-address → write data. Data
can be written to the SM5351AF1 in successive bytes, as the sub-address for the register is incremented auto-
matically after each byte. However, if the sub-address exceeds the address of the last register (02h), data write
operation to the SM5351AF1 register stops and the acknowledge signal is not returned.
The read sequence is: SM5351AF1 slave address → sub-address 0 status register value → sub-address 1 status
register value → sub-address 2 status register value. In status register read-out, the data of all 3 bytes should be
red out. A specific status register sub-address cannot be assigned for a read operation.
2
C-BUS Control
Single byte access
Multi byte access (address auto increment)
S: START condition, P: STOP condition, A: acknowledge
S
S
: drive master device
address
address
Slave
Slave
A
A
S: START condition, P: STOP condition, A: acknowledge
S
2
C-BUS interface to control the following functions:
address
address
: drive master device
Sub
Sub
address
Slave
A
A
A
: drive SM5351AF1
Figure 2. Write sequence
Data
Data
Figure 3. Read sequence
data #0
SM5351AF1
A
A
A
P
Data
: drive SM5351AF1
data #1
A
A
data #2
...
A
SEIKO NPC CORPORATION —15
A
P
Data
A
P
2
C-BUS of