161
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(→4164) |
(→4164) |
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Line 129: | Line 129: | ||
A<sub>4</sub><br> | A<sub>4</sub><br> | ||
A<sub>5</sub><br> | A<sub>5</sub><br> | ||
A<sub>7</sub><br> | |||
|} | |||
</tt> | |||
===4464=== | |||
64Kx4 bit DRAM chip | |||
4 of this IC make the 128K RAM of the [[ZX Spectrum +2A/2B, +3/3B]]. | |||
e.g:MICRON MT4067-15 | |||
Pinout: | |||
<tt> | |||
{| | |||
| style="text-align:right;" | | |||
{{overline|OE}}<br> | |||
DQ<sub>1</sub><br> | |||
DQ<sub>2</sub><br> | |||
{{overline|WE}}<br> | |||
{{overline|RAS}}<br> | |||
A<sub>6</sub><br> | |||
A<sub>5</sub><br> | |||
A<sub>4</sub><br> | |||
(+5V) V<sub>CC</sub> | |||
| style="border: 1px solid black" | | |||
1 ° 18<br> | |||
2 17<br> | |||
3 16<br> | |||
4 15<br> | |||
5 14<br> | |||
6 13<br> | |||
7 12<br> | |||
8 11<br> | |||
9 10<br> | |||
|| | |||
GND (0V)<br> | |||
DQ<sub>4</sub><br> | |||
{{overline|CAS}}<br> | |||
DQ<sub>3</sub><br> | |||
A<sub>0</sub><br> | |||
A<sub>1</sub><br> | |||
A<sub>2</sub><br> | |||
A<sub>3</sub><br> | |||
A<sub>7</sub><br> | A<sub>7</sub><br> | ||
|} | |} | ||
</tt> | </tt> |
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