UPD6466GS Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6466GS

ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 24-COLUMN, CAMERA-CONTAINED VCR

NEC => Renesas Technology 

µPD6466

1. INITIAL STATUS SETTING

1.1 Initial Status Setting

The µPD6466 selects the following parameters that are selected by mask code options with the µPD6461 and 6462,

by using an initial status setting command.

Parameter

(1) Dot clock

(2) Vertical display start position

(3) Pin selection

(4) Output selection

(5) Character color reversal

specification selection

(6) Function selection

LC oscillation

3-row unit setting

RGB + VC1 + VC2

Option A

Black character

Character blinking

Selected by:

External clock input

9-row unit setting

RGB + RGB compatible BLK

(RGB + 3BLK)

Option B

Option C

White character

Character left/right reversal

(1) Dot clock

To select a dot clock for character display. If an external clock input is selected, refer to External Clock Input

in 6. ELECTRICAL CHARACTERISTICS.

(2) Vertical display start position

To select the setting accuracy of the vertical display start position of the character display area. In 3-row units,

the vertical display start position can be set more finely than in 9-row units.

(3) Pin selection

To select the setting of the output pins.

When RGB + VC1 + VC2 is selected, character signals are output from pins VR, VG, VB, VBLK, VC1, BLK1, VC2,

and BLK2. When RGB + 3BLK is selected, character signals are output from pins VR, VG, VB, RBLK, GBLK, BBLK,

VC1, and BLK1.

When RGB + VC1 + VC2 is selected with a video camera with a color view finder, colored characters can be

displayed in the view finder. When RGB + 3BLK is selected, character signals can be separated color

specification.

(4) Output selection

To set the output format of the character signal where the setting of the output pin is RGB + VC1 + VC2 (setting

the output format of the character signal is invalid where the setting of the output pin is RGB + 3BLK).

When an on-screen character display IC is used in a video camera, some items of information (such as date

and title) are displayed on the video tape, and the others (such as battery alarm, focus, and counter indication)

are only displayed in the view finder. The µPD6466 can select these items of information in row or half-row

units by using the output pin. Select the output format from three types: option A, option B, and option C (when

3BLK is selected, however, be sure to select option B).

(5) Character color reversal specification selection

To select the specifications when the character color is reversed (valid only for RGB output).

• Black character: Outputs an area with dots in black and prohibits framing.

• White character: Outputs an area with dots in white and prohibits framing.

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