CXA2040AQ
I2C Bus Control Map
1) Control Register
The CXA2040AQ control system is comprised of 4 bytes of control registers which control the various outputs.
The inputs which are to be output are selected by writing the respective input data into the control register.
S
Slave address
A DATA1 A DATA2 A DATA3 A DATA4 A P
S: START CONDITION
A: ACKNOWLEDGE
P: STOP CONDITION
• Slave address
R/W bit
This bit is set to "0" when data is to be written into the control
registers.
1
0
0
1
0
0
X
0
Value set by the address pin
DATA1 Controls the video output 1.
DATA2 Controls the video output 2.
DATA3 Controls the video output 3.
DATA4 Controls the S terminal output.
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
X
X
video select
X
X
X
Each register is set to "0" upon POWER ON.
• Video switch control map
bit5 bit4 bit3 Selected input signal
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
MUTE
CV1/YC1
CV2/YC2
CV3
CV4
CV5
CV6
CV7
Other conditions: MUTE
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