sm5330a Seiko NPC Corp., sm5330a Datasheet - Page 12

• Manufacturer Part Number: sm5330a
• Description: 3-channel Video Filter With Built-in 4-system Switch
• Manufacturer: Seiko NPC Corp.

FUNCTIONAL DESCRIPTION
I
The SM5330A uses the I
1) Cutoff frequency setting
2) Input type switching (synctip clamp, bias, or direct mode)
3) Mute setting
4) Input switch select
5) I/O output settings
6) DAC output settings
In addition, the interface is used to read the following status parameters:
7) I/O input state
8) D-terminal signal discrimination result
The transfer rate is compatible with fast mode (400kbit/s).
Basic Cycle
The write sequence is: SM5330A slave address → specific control register sub-address → write data. Data can
be written to the SM5330A in successive bytes, as the sub-address for the register is incremented automatically
after each byte. However, if the sub-address exceeds the address of the last register (04h), data write operation
to the SM5330A register stops and the acknowledge signal is not returned.
The read sequence is: SM5330A slave address → sub-address 0 status register value → sub-address 1 status
register value → sub-address 2 status register value. Each read cycle comprises 3 bytes of read data. 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
2
A
A
S: START condition, P: STOP condition, A: acknowledge
C BUS interface to control the following functions:
S
address
address
Sub
Sub
: drive master device
address
Slave
A
A
A
: drive SM5330A
Figure 1. Write sequence
Data
Data
Figure 2. Read sequence
Data #0
SM5330A
A
A
A
P
Data
: drive SM5330A
Data #1
A
A
Data #2
...
A
SEIKO NPC CORPORATION —12
A
P
Data
A
P