CXA2040 데이터 시트보기 (PDF) - Sony Semiconductor
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CXA2040 Datasheet PDF : 22 Pages
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CXA2040Q
Description of Operation
1) Composite Video System I/Os
There are three systems of composite outputs. Each output switch can select the eight systems of CV1 to CV5
composite video inputs, CV6 and CV7 Y/C MIX (composite video) inputs and MUTE. All composite video
inputs are input from the input pins to each switch by DC coupling. CV6 is the composite video signal obtained
by inputting Y1 and C1 to an adder and adding Y1 and C1. CV7 is the composite video signal obtained by
inputting Y2 and C2 to an adder and adding Y2 and C2. The CV6 and CV7 composite video signals are input
from the input pins to each switch by DC coupling. When MUTE is selected, the internal bias DC output
(approximately VCC/2 [V]) is input to each switch. Only one type of input is selected by the I2C bus control
register. The CVOUT1 and CVOUT3 switches output the signal selected by the I2C bus at a gain of 0 [dB] with
respect to the input signal. The switch output stages are push-pull circuits which output at low impedance. The
CVOUT2 switch outputs the signal selected by the I2C bus amplified to +6 [dB] with respect to the input signal.
The switch output stage is a push-pull circuit which outputs at low impedance. The switches are DC coupled
from input to output.
2) Y System I/Os
The YOUT switch can select the three systems of Y1, Y2 and MUTE. Y1 and Y2 are input from the input pins
to the switch by DC coupling. When MUTE is selected, the internal bias DC output (approximately VCC/2 [V]) is
input to the switch. Only one type of input is selected by the I2C bus control register. The YOUT switch outputs
the signal selected by the I2C bus at a gain of 0 [dB] with respect to the input signal. The switch output stage is
a push-pull circuit which outputs at low impedance. The switch is DC coupled from input to output.
3) C System I/Os
The COUT switch can select the three systems of C1, C2 and MUTE. C1 and C2 are input from the input pins
to the switch by DC coupling. When MUTE is selected, the internal bias DC output (approximately VCC/2 [V]) is
input to the switch. Only one type of input is selected by the I2C bus control register. The COUT switch outputs
the signal selected by the I2C bus at a gain of 0 [dB] with respect to the input signal. The switch output stage is
a push-pull circuit which outputs at low impedance. The switch is DC coupled from input to output.
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