ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER,12-ROW, 28-COLUMN, CAMERA-CONTAINED VCR

The μPD6467 is a CMOS LSI for on-screen character display, and can be used in combination with a microcomputer to display the tape counter, time, and date in the view finder of a video camera, or the time of a video tape, messages such as dates on pictures, and channel number on a TV screen. Characters are displayed in 12 (horizontal) by 18 (vertical) dots. Two or more characters can be combined to display Kanji (Japanese characters) and symbols. This LSI supports color view finders and is provided with three sets of character output signals (RGB output: for color view finder, VC1output: for recording (or monitor pin), VC2output: for monitor pin (or recording)).

FEATURES

? Number of display characters : 12 rows, 28 columns (336 characters)

? Types of character : 512 types (ROM). Changeable by using mask code option.

? Character size : Can be expanded up to four-fold in vertical and horizontal directions

independently, in units of lines.

? Number of character colors : 8 colors

? Framing : Framing or no framing, or white or black framing selectable in screen units.

? Dot matrix : 12 (horizontal) ×18 (vertical) dot configuration. No gap between adjacent characters.

? Blinking : Blinking can be turned ON/OFF in character units. The blinking ratio is 1:1. The blinking frequency can be selected from about 1 Hz, about 2 Hz, and about 0.5 Hz in screen unit.

? Character color reversing function : The color of the character and that of the background can be reversed.

? Character left and right reverse : Left and right can be reversed for display in character units.

? Background : No background, blank background, or filled background selectable in screen units.

? Blue back function : Blue or white can be selected as the background.

? External dot clock input : Frequency 2-divide function is selectable.

? Signal output : 3 sets (output (1) R, G, B + BLK/VC1+ VBLK1/VC2+ VBLK2and output (2) R +

RBLK/B + BBLK/G + GBLKselectable by command) When output (1) is selected, VC1and VC2outputs can be selected from three types.

? Video RAM data clear : Implemented by video RAM batch clear command or by clear function on power-ON.