UPD6461GS Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6461GS

CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY (12 ROWS × 24 COLUMNS)

NEC => Renesas Technology 

µPD6461, 6462

1. MASK CODE OPTIONS

1.1 MASK CODE OPTIONS

The µPD6461, µPD6462 provide mask options for selecting the following items:

Item

(1) Data transfer

(2) Vertical display start position

(3) Pin selection

(4) Output distribution format

(5) Dot clock

Selections

LSB first

MSB first

Specified in three-line units

Specified in nine-line units

RGB+VC1+VC2

RGB+3BLK

Option A

Option B

Option C

LC oscillation

External clock input

(1) Data transfer

Select the command transfer format.

(2) Vertical display start position

Select the units used for specifying the vertical display start position of the character display area. In three-line units,

the vertical display start position can be set more finely than in nine-line units.

(3) Pin selection

Select the pins used to output character signals. In RGB+VC1+VC2 mode, character signals are output from the VR,

VG, VB, VBLK, VC1, BLK1, VC2, and BLK2 pins. In RGB+3BLK mode, character signals are output from the VR, VG, VB,

RBLK, GBLK, BBLK, VC1, and BLK1 pins.

When displaying colored characters in a color viewfinder, select RGB+VC1+VC2 mode. When assigning a separate

character signal for each color, select RGB+3BLK mode.

(4) Output distribution format

Select the format to be used to distribute character signals to the VC1 and VC2 channels when RGB+VC1+VC2 mode

is selected. (When RGB+3BLK mode is selected, select option A as the output distribution format. Options B and C

are invalid.)

When an on-screen IC is used in a camcorder, some information is displayed in the viewfinder and recorded onto

video tape (such as a date and title). Other information, however, need only be displayed in the viewfinder (battery

or focus alarm and tape count). The µPD6461, 6462 can distribute such information to different output channels in

units of rows or half rows. You can select option A, option B, and option C as the output distribution format (only when

RGB+VC1+VC2 mode is selected).

(5) Dot clock

Select the dot clock to be used to display characters. When an external clock input is selected, refer to EXTERNAL

CLOCK INPUT in 6. ELECTRICAL CHARACTERISTICS.

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