M52797FP Mitsubishi, M52797FP Datasheet - Page 5

• Manufacturer Part Number: M52797FP
• Description: AV SWITCH with I2C BUS CONTROL
• Manufacturer: Mitsubishi

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 channel switchs with 1-byte data ( DATA1) .
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
17PIN Hi:1,Lo:0
6
A
P
7
LSB
8
MITSUBISHI ICs (AV COMMON)
A
9
AV SWITCH with I2C BUS CONTROL
MSB
1
M52797SP/FP
2
(at 28P4B)
LSB
A
9
P
AUG.'98
5
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