LC7441N(2001) データシートの表示（PDF） - SANYO -> Panasonic

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LC7441N
(Rev.:2001)

Picture-in-picture Controller for TVs and VCRs

SANYO -> Panasonic 

LC7441N, 7441NE

Function Description

NTSC/PAL

NTSC/PAL should be tied HIGH for NTSC, and LOW

for PAL.

TV/VCR

TV/VCR should be tied HIGH for television mode, and

LOW for VCR mode. The differences between the two

modes are shown in the following table and figure.

Parameter

Television (TV/VCR is HIGH)

VCR (TV/VCR is LOW)

Horizontal and vertical sync polarity

Y-signal D/A converter output polarity

WAKU output vertical frame

KOUT, WAKU and D/A converter output

timing

Output simultaneously

KOUT and WAKU delayed 528 ns

Note

The shaded D/A converter outputs indicate frame data. t1=132ns, t2=396ns, t3=528ns, t4=176ns, t5=308ns, t6=352ns,

t7=220ns, t8=616ns, and t9=484ns

A/D Converter Interface

The PIP controller interfaces with an LC7480 multiplex-

ing A/D converter using the AD0 to AD5 and VREF

inputs and CLAMPAD, YSW, RSW, BSW and ADCLK

outputs. The LC7480 converts the Y, R – Y and B – Y

video signals into 6-bit digital data which is input to the

PIP on AD0 to AD5. YSW, RSW and BSW control the

LC7480 input multiplexer. The conversion sequence is Y,

R – Y, Y, B – Y, as shown in the following figure. The

conversion frequencies are shown in the following table.

The LC7441 and LC7480 should be mounted as closely

as possible and care taken with the PCB layout because

of the high signal frequencies.

No.3941–9/20

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