M52791 View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M52791

AV SWITCH with I2C BUS CONTROL

MITSUBISHI ELECTRIC  

PRELIMINARY

Notice. This is not a final specification.

Some parametric limits are subject to change.

MITSUBISHI ICs (AV COMMON)

M52791SP/FP

AV SWITCH with I2C BUS CONTROL

I2 C BUS

I 2C 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 .

SDA

SCL

MSB

A

LSB

MSB

A

LSB

S

12345678912

P

9

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

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 ) . Video switches are

controled by DATA1 , audio switches are controled by DATA2 .

S SLAVE ADDRESS A DATA1 A DATA2 A P

S : Start

A : Acknowledge

P : Stop

SLAVE ADDRESS

1 0 0 1 0 0X 0

R/W bit

Usually ` 0 ` ( W : Master transmitter transmits to slave

receiver )

Possible to select

22PIN : Hi : 1,Lo : 0

MITSUBISHI

6 -10

AUG.'98

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