UPD6466GS datasheet(6/70 Pages) NEC

6 / 70 page

µPD6466

PIN FUNCTIONS

Pin No.Note 1

Pin NameNote 2

Function

SymbolNote 2

CLK

Clock input

This pin inputs a clock for reading data. Data input to the DATA pin

is read at the rising edge of this clock.

Chip select input

Serial transfer can be accepted if this pin is made low.

3 (4)

DATA

Serial data input

This pin inputs control data. Data is read in synchronization with the

clock input to the CLK pin.

4 (5)

PCL

Power-ON clear

This pin, when high, initializes the internal circuitry of the IC on power

application.

5 (6)

VDD

Power supply

This pin supplies power.

6 (7)

CMDCT

Command specification

This pin selects whether a command is input with the LSB first or MSB

select

first.

When this pin is low, the command is input with the LSB first; when

it is high, the command is input with the MSB first. To input the

command with the LSB first, this pin may be opened.

7 (8)

OSCOUT

LC oscillation I/O

These are an input and an output pin for an oscillation circuit that

8 (9)

OSCIN

(OSCIN: external clock

generates a dot clock.

input)

A coil and capacitor for oscillation are connected to these pins. (If

the input of an external clock is selected by the initial status setting

command, an external clock (clock synchronized with Hsync) is input.

OSCOUT is opened at this time.)

9 (10)

TEST

Test pin

This pin is used to test the IC. Normally, connect this pin to GND.

When the TEST pin is connected to GND, the test mode is not set.

10 (11)

GND

Ground pin

Connect this pin to GND of the system.

11 (14)

BLK1

Blanking signal output 1

This pin outputs a blanking signal to cut the video signal.

It supports output of VC1, and is high-active.

(If RGB compatible blanking is selected by a command, this pin

outputs the logical sum of RBLK, GBLK, and BBLK.)

12 (15)

VC1

Character signal output 1

This pin outputs a character signal, and is high-active.

(If RGB compatible blanking is selected by a command, this pin

outputs the logical sum of VR, VG, and VB.)

13 (16)

BLK2

Blanking signal output 2

This pin outputs a blanking signal to cut the video signal. It supports

(RBLK)

(blanking R)

output of VC2, and is high-active.

(This pin outputs a blanking signal supporting output of VR and is

high-active.)

14 (17)

VC2

Character signal output 2

This pin outputs a character signal, and is high-active.

(GBLK)

(blanking G)

(This pin outputs a blanking signal supporting output of VG and is

high-active.)

15 (18)

VBLK

Blanking signal output

This pin outputs a blanking signal to cut the video signal. It supports

(BBLK)

(blanking B)

output of VR, VG, and VB, and is high-active (this pin outputs a blanking

signal supporting output of VB and is high-active).

16 (19)

Character signal output

This pin outputs a character signal, and is high-active.

17 (20)

18 (21)

19 (23)

Vsync

Vertical sync signal input

This pin inputs a vertical sync signal. Input a negative sync signal.

20 (24)

Hsync

Horizontal sync signal input

This pin inputs a horizontal sync signal. Input a negative sync signal.

(3, 12, 13, 22)

N.C.

Vacant

Vacant pin

Notes 1.

( ): Pin numbers of

µPD6466GT-xxx

Signals in ( ) are set by the initial status setting command (RGB + RGB compatible blanking).

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