UPD6464A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6464A

ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR

NEC => Renesas Technology 

µPD6464A,6465

PIN FUNCTIONS

No.

Symbol

Pin Name

1

CLK

Clock input

2

CS

Chip select 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.

3

DATA

Serial data input

4

VDD

Power supply

5

OSCOUT

LC oscillation output

6

OSCIN

LC oscillation input

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.

7

PCL

Power-ON clear

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

initializes the internal circuitry of the IC.

8

GND

Ground

Ground pin of the IC.

9

FSCI

fSC signal input

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.

10 FSCO

Frequency error output

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.

11 XOSO

12 XOSI

Quadruple oscillation output

Quadruple oscillation input

A quadruple oscillation LC for internal video signal generation is

connected to these pins. A crystal oscillator can also be

connected.

13

VC

Character signal output

Character signal output pin. Positive signal output.

14

VBLK

15 HSYO

Blanking signal output

Horizontal synchronization 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.

16 VSYO

Vertical synchronization signal

output

Outputs a vertical synchronization signal separated from a

composite synchronization signal.

17 CSYIN

18 N. C.

Composite synchronization signal

input

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

Non connection. Leave this pin open.

19 TEST

Test pin

Test mode select pin. Connect this pin to GND.

20 NRE

21 VBSO

Noise reduction constant append Constant append pin for noise reduction.

Composite video signal output

Outputs a composite video signal mixing a character signal.

22 SECAM SECAM subcarrier input

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

except for SECAM, this pin should be open.

23

VCNT

24 VBSI

Video signal output level adjust-

ment

Composite video signal input

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.

4

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