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Description
The µPD6461GS-957-E1 is a CMOS LSI chip designed for on-screen character display for camcorders. It is compatible with color viewfinders and can output character signals to three channels. With the combination of a microcontroller, it controls the display of characters in the viewfinder and the recording of characters onto video tape. Kanji characters and graphic symbols can also be displayed using this chip. It has a power-on clear function and video RAM batch clear command to reduce the workload of the microcontroller.
Specifications and features
- Maximum number of characters: 12 rows × 24 columns (288 characters)
- Number of character patterns: 256 (µPD6461) / 128 (µPD6462) (stored in ROM)
- Character size: One dot per line or one dot per two lines (field)
- Number of character colors: 8
- Background: No background, minimum background, or overall background can be selected for the entire screen. Selectable background colors and rim colors (black or white) per screen.
- Dot matrix: Each character consists of 12 (width) × 18 (height) dots with no gap between adjacent characters.
- Blinking: Blinking can be turned on/off for each character. The blinking ratio is 1:1, and the blinking frequency can be selected from approximately 1 Hz, 2 Hz, and 0.5 Hz for the entire screen.
- Reversed characters: Specified characters can be displayed in reverse video.
- Character signal output: Character signals can be output to three channels. Output modes (RGB + BLK, VC1 + VBLK1, and VC2 + VBLK2) or (R + RBLK, B + BBLK, and G + GBLK) can be selected.
- Clearing of video RAM: Video RAM batch clear command and power-on clear function.
- Interface with a microcontroller: 8-bit serial input supporting variable word length (LSB first or MSB first can be selected).
- Supply voltage: Low-voltage operation possible (supply voltage range: 2.7 to 5.5 V)
Application Scenarios
The µPD6461GS-957-E1 can be used in camcorders for on-screen character display in the viewfinder. It is suitable for displaying count, time, date, and other information. The chip is also helpful in recording characters onto video tape, providing additional information such as time and date.
Comparison
Advantages- Provides on-screen character display for camcorders
- Compatible with color viewfinders
- Can output character signals to three channels
- Low-voltage operation possible
Disadvantages- Maximum number of characters limited to 288
- Number of character patterns limited to 256 (µPD6461) / 128 (µPD6462)
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Datasheet
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- Datasheet: Download UPD6461GS-957-E1
- Chipdatas Part: CD94-UPD6461GS-957-E1
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/13 02:26 +0800
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