MM1423 MITSUMI [Mitsumi Electronics, Corp.], MM1423 Datasheet - Page 10

• Manufacturer Part Number: MM1423
• Description: Canal+Compatible I2C Bus Controlled 4-input 3-output AV Switch
• Manufacturer: MITSUMI [Mitsumi Electronics, Corp.]

MITSUMI
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]
[Control Register 2]
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.
0, 12dB select
b7
b7
S
OUT 1 select
1
Canal+Compatible I
Port 1 CTRL
0
b6
b6
Slave address
0
Address byte
1
Port 2 CTRL
0
b5
b5
2
C Bus Controlled 4-input 3-output AV Switch MM1422, 1423, 1442, 1443
OUT 2 select
0
0
Audio OUT2 gain select
R/W
b4
b4
1
A
b7
b3
b3
b6
OUT 3 select
b5
status register
Status data
Audio OUT3 gain select
b4
b2
b2
b3
b2
b1
b1
b1
FS CTRL
b0
NA
Mute
b0
b0
P