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DRAMS

888 bytes added, 18:03, 17 October 2016
4532
The A<sub>7</sub> line is omitted for refresh address.
 
===4164===
64Kx1 bit DRAM chip
 
16 of this IC make the 128K RAM of the ZX Spectrum48 RAM.
 
e.g:NEC D4164C-3
 
Pinout:
 
<tt>
{|
| style="text-align:right;" |
NC<br>
D<sub>IN</sub><br>
{{overline|WE}}<br>
{{overline|RAS}}<br>
A<sub>0</sub><br>
A<sub>2</sub><br>
A<sub>1</sub><br>
(+5V) V<sub>CC</sub>
| style="border: 1px solid black" |
1&nbsp;°&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16<br>
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15<br>
3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;14<br>
4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;13<br>
5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12<br>
6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11<br>
7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10<br>
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9
||
GND (0V)<br>
{{overline|CAS}}<br>
D<sub>OUT</sub><br>
A<sub>6</sub><br>
A<sub>3</sub><br>
A<sub>4</sub><br>
A<sub>5</sub><br>
A<sub>7</sub><br>
|}
</tt>
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