HD63487

The HD63487 is designed as memory interface and video attribute controller (MIVAC). It includes peripheral control circuits for grapghic display on a chip. Incorporating bus driver circuits and a DRAM interface, the MIVAC allows direct connection to DRAMs with no external circuits. On-chip parallel / serial converting shift register generates high speed video signals.

It has sixteen features. (1)Directly connected with 1 to 4 memory devices (x 4 bit organization, static column mode). (2)Generates DRAM interface signals row and column address, RAS, CS, OE, WE and memory data. (3)Generates high speed video signal dot rate of 33MHz max. (4)16 kinds of operation modes by the combination of 2, 4 and 16 colors (1, 2 and 4 bit/pixel); 8, 16 and 32 dot shift; single dual access; 1, 2 and 4 chips memory. (5)Blinking block cursor display. (6)Memory variation 256 x 4 static column mode DRAM. (7)Generates special clock drive the ACRTC (asymmetrical 2CLK). (8)Input clock divider to generate dot clocks (divided by 1, 2 and 4). (9)Supports frame sequential application. (10)Blink2 interrupting control. (11)CS before RAS refresh. (12)Direct interface with the ACRTC. (13)Supports hardware window of ACRTC. (14)TTL compatible input / output. (15)Single +5V power supply. (16)Low power dissipation. That are all the main features.

Some absolute maximum ratings have been concluded into several points as follow. (1)Its supply voltage would be from -0.3V to +7.0V. (2)Its input voltage would be from -0.3V to Vcc+0.3V. (3)Its output voltage would be 5.5V. (4)Its operating temperature range would be from 0°C to +70°C. (5)Its storage temperature range would be from -55°C to +150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!