sm5302a Nippon Precision Circuits Inc, (NPC), sm5302a Datasheet - Page 12

• Manufacturer Part Number: sm5302a
• Description: 3-channel Video Buffer With Built-in Wideband Lpf
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

FUNCTIONAL DESCRIPTION
I
The SM5302A uses an I
1) Cutoff frequency
2) Output gain
3) fc mode switching (1/2 cutoff frequency switching)
4) Filter mode/filter bypass mode switching
5) Input multiplexer selection
6) Input type switching (sync-tip clamp, bias, direct)
7) Disable function
8) Maximum number of slave addresses
It supports fast-mode data transfer rate (up to 400kbit/s).
Note that the SM5302A does not have a read function (IC is write only).
Basic cycle
2
C BUS Control
SDA
SCL
The basic access cycle comprises the following elements.
If the input data does not match the slave address or the subaddress is incorrect, the corresponding ACK
(acknowledge) bit is not output LOW. However, the ACK bit is output after 3rd byte irrespective of the byte
data. Also note that the IC does not have a subaddress auto-increment function, hence each subaddress
access requires all the basic cycle steps 1 to 5.
1) Start condition
2) 1st byte: Slave address
3) 2nd byte: Subaddress
4) 3rd byte: Control data
5) Stop condition
Start
D7
1
SDA
SCL
1st byte:Slave address
D6
2
Start condition
2
C BUS interface to set the following functions.
D1
7
D0
Low
8
ACK
9
I
2
D7
1
C start/stop condition
2nd byte:Subaddress
D6
2
SM5302A
D1
7
D0
8
ACK
9
D7
1
3rd byte:Control data
D6
SEIKO NPC CORPORATION —12
2
Stop condition
D1
7
D0
8
ACK
9
Stop