µPD6464A
On-screen Character Display CMOS LSI for 12-Line, 24-Column Deck-Type VCR
- Only a version with NEC standard character ROM code is available for the µPD6464A.
Overview
The µPD6464A is a CMOS LSI for on-screen character display that control various display systems (such as tape counters) including the program screens of deck-type VCRs and LD players. This LSI is used in combination with a microcomputer.
It can display characters each consisting of 12 (horizontal) by 18 (vertical) dots. Some chinese characters and some pictograms can also be displayed by combining two or more characters.
The µPD6464A includes a power-ON clear function and a video RAM batch clear command that mitigate the workload of the host microcomputer. It also has a synchronization separator and a ×4 multiplier on chip, eliminating the need of connecting an external separator IC and a crystal resonator, which reduces the mounting area and the total cost.
Features
- Video signal input/output : Composite video signal
- Number of display characters : 12 lines, 24 columns (288 characters)
- Number of character types : 128 (ROM). Variable by mask code option.
- Character size : 1 dot/1 line. 2 lines (field) can be displayed in line units.
- Character color : White (single color)
- Background : No background, black framing, black-on-white, and black filling
- Dot matrix : 12 (horizontal) × 18 (vertical) dots without gap between adjacent characters
- Blinking : Blinking can be turned ON/OFF in character units. Blinking ratio is 1:1.
Blinking frequency is selectable from about 0.5 Hz, 1 Hz, and 2 Hz in screen units.
- Character signal output : Can support VCRs with S pins if external mixer is connected because caracter signal and blanking signal output pins are provided.
- Video RAM data clear : Video RAM data are cleared by video RAM clear command and power-ON clear function.
- Supported video signal method : NTSC/PAL/PAL-M/SECAM/PAL-N
- Internal circuit : Synchronization separation circuit for composite synchronizing signal and ×4 multiplier
- Interface with microcomputer : Serial input type of 8-bit variable word length
- Supply voltage : +5 V, single power supply
Ordering Information
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Order Code
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Package
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µPD6464AGT-101
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24-pin plastic SOP (7.62 mm (375))
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-101: NEC standard character ROM code suffix.
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Document List
Data Sheet
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Part Number
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Document Number
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µPD6464A
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S11043E
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Technical Document
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Document Name
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Document Number
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OSD LSIs User's Manual
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S13197E
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Character Pattern Editor
for On-Screen Display LSI for Windows®
User's Manual
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S13317E
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Block Diagram
