m52795 Mitsumi Electronics, Corp., m52795 Datasheet - Page 5

• Manufacturer Part Number: m52795
• Description: Av Switch With I2c Bus Control
• Manufacturer: Mitsumi Electronics, Corp.

PRELIMINARY
Notice. This is not a final specification.
Some parametric limits are subject to change.
I C BUS
I C BUS(Inter IC BUS)is multi master bus system developed by PHILIPS . Two wires ( SDA - serial data,
SCL - serial clock ) realize functions of start , stop , transferring data , synchronization and arbitration. The
output stages of device connected to the bus must have an open drain or open collector in order to perform the
wired-AND function .
Every byte put on the SDA line must be 8-bits long . Each byte has to be followed by an acknowledge bit. Data
is transferred with the most significant bit (MSB ) first . The data on the SDA line must be stable during the
HIGH period of the clock . The HIGH or LOW state of the data line can only change when the clock signal on
the SCL line is LOW .
CONTROL
This IC controls 2-channel switchs with 2-byte data ( DATA1 and DATA2 ) . SW1 is controled by
DATA1 ,
SW2 is controled by DATA2 .
SLAVE ADDRESS
2
2
SDA
SCL
S
1
S : Start
A : Acknowledge
P : Stop
SLAVE ADDRESS A
0
S
S ; Start condition, a high to low transition of the SDA line while SCL is high
P ; Stop condition, a low to high transition of the SDA line while SCL is high
A ; Acknownledge
0
MSB
1
1
2
0
0
3
M I T S U B I S H I
X
4
DATA1
0
5
R/W bit
Usually ` 0 ` ( W : Master transmitter transmits to slave
receiver )
Possible to select
16PIN Hi:1,Lo:0
6
A
DATA2
7
LSB
8
MITSUBISHI ICs (AV COMMON)
A
A
9
AV SWITCH with I2C BUS CONTROL
P
MSB
1
M52795SP/FP
2
LSB
A
9
P
AUG.'98
5
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