The MB1422A by Fujitsu is a DRAM Controller LSI. Below is the official datasheet preview.
| Part number | MB1422A |
|---|---|
| Manufacturer | Fujitsu |
| File Size | 1.01 MB |
| Description | DRAM Controller LSI |
| Datasheet |
 MB1422A-Fujitsu.pdf
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Type Pin Name and Function I Internal/External Refresh Select; This pin is used to select refresh mode, internal refresh or external refresh.If MODEO/RESET ~ "H", internal refresh mode is selected.If MODEO/RESET ~ "L", external refresh mode.The falling edge of MODEO/RESET resets the refresh address counter.I Internal Interval Select/External Refresh Request; When Internal Refresh mode is selected (MODEO/RESET ~ "H"l.this pin is used as refresh interval selection.If CLK:;;; 15M
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