Datasheet Details
| Part number | UM83C002 |
|---|---|
| Manufacturer | Unicorn Microelectronics |
| File Size | 663.36 KB |
| Description | RAM Buffer Controller |
| Datasheet |
 UM83C002 Datasheet
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General Description
The RAM B U F F E R C O N T R O LLE R contains three high-speed DMA channels: a host computer address port, dynamic RAM refresh circuitry, and RAM access priority logic.
One of the DMA address counters points inside the buffer RAM for transferring data between the RAM and the disk.
Key Features
- 3 DMA channels.
- Host processor port.
- Refresh circuit for dynamic RAM built-in.
- RAM access priority network.
- Address multiplexing for dynamic RAM.
- Multiplexed address and data lines from processor.
- Pins arranged for easy integration into 8088/8086 systems.
- No lost RAM cycles for DMA break-in.
- DMA carry output permits DMA across 64K boun daries.
- 24 bit timer or baud rate generator.
- T T L compatible inputs and outputs. Outputs drive 8 L S T.