UPD6465CS datasheet(4/52 Pages) NEC

4 / 52 page

µPD6464A,6465

PIN FUNCTIONS

No.

Symbol

Pin Name

CLK

Clock input

Chip select input

DATA

Serial data input

4VDD

Power supply

OSCOUT

LC oscillation output

OSCIN

LC oscillation input

PCL

Power-ON clear

GND

Ground

FSCI

fSC signal input

FSCO

Frequency error output

XOSO

Quadruple oscillation output

XOSI

Quadruple oscillation input

Character signal output

VBLK

Blanking signal output

HSYO

Horizontal synchronization signal

output

VSYO

Vertical synchronization signal

output

CSYIN

Composite synchronization signal

input

N. C.

Non connection

TEST

Test pin

NRE

Noise reduction constant append

VBSO

Composite video signal output

SECAM

SECAM subcarrier input

VCNT

Video signal output level adjust-

ment

VBSI

Composite video signal input

Function

Inputs clock for data read. Data input to the DATA pin is read at

the rising edge of the clock input to this pin.

Serial transfer can be acknowledged by making this CS pin low.

Inputs control data. Data is read in synchronization with the clock

input to the CLK pin.

Supplies power to the IC.

These are input and output pins of an oscillator that generates

dot clocks. Connect a coil and a capacitor to these pins for

oscillation.

Power-ON clear pin. Make this pin high on power application. It

initializes the internal circuitry of the IC.

Ground pin of the IC.

In case of the

×4 multiplier, the color sub-carrier (fSC) is input to

this pin. In case of the 4fSC Crystal oscillation, connect this pin to

GND or VDD.

The frequency error signal of the

×4 multiplier is output to this

pin. In case of the 4fSC Crystal oscillation, this pin should be

open.

A quadruple oscillation LC for internal video signal generation is

connected to these pins. A crystal oscillator can also be

connected.

Character signal output pin. Positive signal output.

This pin outputs a blanking signal that cuts the video signal. It

corresponds to the output of VC. Positive signal output.

Outputs a horizontal synchronization signal separated from a

composite synchronization signal.

Outputs a vertical synchronization signal separated from a

composite synchronization signal.

A composite synchronization signal is input to this pin for

synchronization signal separation. In case of the external signal

mode, input the signal certainly. Input a positive synchronization

signal.

Non connection. Leave this pin open.

Test mode select pin. Connect this pin to GND.

Constant append pin for noise reduction.

Outputs a composite video signal mixing a character signal.

SECAM sub-carrier signal mixing pin. In cases of any system

except for SECAM, this pin should be open.

Adjusts the output level of the composite video signal and

luminance signal.

Inputs a composite video signal. Inputs a signal with the leading

edge clamped, consisting of a negative synchronization signal

and a positive video signal.

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