LC74788 datasheet(3/23 Pages) SANYO

3 / 23 page

No. 5731-3/23

LC74788, 74788M, 74788JM

Continued from preceding page.

Pin no.

Function

Notes

CVOUT

Video signal output

Composite video signal output

VSS2

Ground

Ground connection (analog system ground)

CVIN

Video signal input

Composite video signal input

CVCR

Video signal input

SECAM chrominance signal input

VDD1

Power supply

Power supply (+5 V: digital system power supply)

Video signal input to the internal sync separator circuit (Used as either the horizontal

SYNIN

Sync separator circuit input

synchronizing signal or the composite synchronizing signal input when the internal sync

separator circuit is not used.)

SEPC

Sync separator circuit bias

Internal sync separator circuit bias voltage monitor

voltage

SEPOUT

Composite synchronizing

Internal sync separator circuit composite synchronizing signal output. Can be switched to

signal output

function as a signal (high, low, or ST. pulse) output by the SEL0 and MOD0 setting.

Inputs the vertical synchronizing signal created by integrating the SEPOUT pin output signal.

SEPIN

Vertical synchronizing signal input

An integration circuit must be connected to the SEPOUT pin. This pin must be tied to VDD1 if

unused. This pin can be switched to function as the frame signal input mode by setting SEL1

high. This is valid when CTL3 is set high. This input has hysteresis characteristics.

CDLR

Background color phase

Background color phase adjustment. Connect a resistor between this pin and ground.

adjustment

RST

Reset input

System reset input

A pull-up resistor is built in and the input has hysteresis characteristics.

VDD1

Power supply (+5 V)

Power supply (+5 V: digital system power supply)

Note: Both VDD1 pins must be connected to the power supply.

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