sm5309a Nippon Precision Circuits Inc, (NPC), sm5309a Datasheet - Page 11

• Manufacturer Part Number: sm5309a
• Description: 3-channel Video Buffer With Built-in Wideband Lpf
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

FUNCTIONAL DESCRIPTION
I
The SM5309A uses an I
1) Cutoff frequency
2) Input multiplexer selection
3) fc mode switching (1/2 cutoff frequency switching)
4) Filter mode/filter bypass mode switching
5) Input type switching (sync-tip clamp, bias, direct)
6) Power-down function
The transfer rate of I
support a read function (IC is write only).
Basic cycle
The basic access cycle comprises the following elements.
1) Start condition
2) 1st byte: Slave address
3) 2nd byte: Subaddress
4) 3rd byte: Control data
5) Stop condition
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 support a subaddress auto-increment function, hence each subaddress
access requires all the basic cycle steps 1 to 5.
2
C-BUS Control
SDA
SCL
Start
SDA
SCL
D7
1
1st byte:Slave address
D6
Start condition
2
2
C-BUS corresponds to the fast-mode (up to 400kbit/s). Note that the SM5309A does not
2
C BUS interface to set the following functions.
D1
7
D0
Low
8
ACK
9
I
2
C-BUS start/stop condition
D7
1
2nd byte:Subaddress
D6
2
SM5309A
D1
7
D0
8
ACK
9
D7
1
3rd byte:Control data
D6
2
SEIKO NPC CORPORATION —11
Stop condition
D1
7
D0
8
ACK
9
Stop