MM1422 データシートの表示（PDF） - Mitsumi
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MM1422 Datasheet PDF : 13 Pages
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MITSUMI
Canal+Compatible I2C Bus Controlled 4-input 3-output AV Switch MM1422, 1423, 1442, 1443
The data format of the MM1422 series is set as shown in the above figure. Out of the address bytes, first 7
bits are assigned to the slave addresses, while the residual 1 bit is assigned to the R/W bit. Set the R/W bit to
0 when data are used as control registers. Slave address of the MM1422 series is 90H. Each bit of control
registers is reset to 0. MM1422 series consists of one address byte and two control data bytes(3 bytes in
total). For details of the control contents of control register 1 and 2, refer to the separate table.
[Control Register 1]
b7
b6
OUT 1 select
b5
b4
OUT 2 select
b3
b2
OUT 3 select
b1
b0
FS CTRL
[Control Register 2]
b7
b6
b5
b4
b3
0, 12dB select Port 1 CTRL Port 2 CTRL Audio OUT2 gain select
b2
b1
Audio OUT3 gain select
b0
Mute
All data over the limited length (4th and subsequent bytes) are fully neglected. Because of this, the faulty
operation that switch changes by the data after the 4th byte doesn't occur.
Each audio output can be set to mute by setting MUTE terminal to high.
[Status registers]
There is no preparation of the status register in MM1422 series. A status register returns all the 1 when is set
in the R/W bit.
Slave address
R/W
status register
S
A
NA P
10010001
b7 b6 b5 b4 b3 b2 b1 b0
Address byte
Status data
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