DRAM 256k x 4: Difference between revisions
From Citylan
Jump to navigationJump to search
m (→Pinout) |
mNo edit summary |
||
Line 11: | Line 11: | ||
|- | |- | ||
|Samsung || KM || 4C258 || DIP20 SOJ20 ZIP20 || . || KM4C258 | |Samsung || KM || 4C258 || DIP20 SOJ20 ZIP20 || . || KM4C258 | ||
|- | |||
|Note: | |||
*256= Fast page mode | |||
*258= Static column mode | |||
|| || || || || | |||
|} | |} | ||
Line 28: | Line 33: | ||
=Pinout= | =Pinout= | ||
<pre> | <pre> | ||
DIP20 SOJ20 | |||
+---\/---+ | +---\/---+ | ||
DQ1 | 1 20| Vss | DQ1 | 1 20| Vss | ||
Line 41: | Line 46: | ||
Vcc |10 11| A4 | Vcc |10 11| A4 | ||
+--------+ | +--------+ | ||
ZIP20 | ZIP20 | ||
^ | ^ | ||
*G 1 | | |||
| 2 | | 2 *CAS | ||
DQ3 3 | | |||
| 4 Vss | | 4 DQ4 | ||
Vss 5 | | |||
| 6 | | 6 DQ1 | ||
DQ2 7 | | |||
| 8 *RAS | | 8 *W | ||
*RAS 9 | | |||
| 10 | | 10 NC | ||
A0 11 | | |||
| 12 | | 12 A1 | ||
A2 13 | | |||
| 14 A5 | | 14 A3 | ||
Vcc 15 | | |||
| | | 16 A4 | ||
A5 17 | | |||
| 18 A6 | |||
A7 19 | | |||
| 20 A8 | |||
- | - | ||
</pre> | </pre> |
Revision as of 20:57, 1 February 2017
BRAND | TAG | NUMBER | PIN COUNT | OUTPUT | MARKINGS |
---|---|---|---|---|---|
Samsung | KM | 4C256 | DIP20 SOJ20 ZIP20 | . | KM4C256 |
Samsung | KM | 4C258 | DIP20 SOJ20 ZIP20 | . | KM4C258 |
Note:
|
Dynamic Random-Access Memory 256K x 4
Size
bit | Byte (padded 0000xxxx) | Byte (unpadded) | Hex |
---|---|---|---|
1Mb | 256KB | 128KB | 100000hex |
Pinout
DIP20 SOJ20 +---\/---+ DQ1 | 1 20| Vss DQ2 | 2 19| DQ4 *W | 3 18| DQ3 *RAS | 4 17| *CAS NC | 5 16| *G A0 | 6 15| A8 A1 | 7 14| A7 A2 | 8 13| A6 A3 | 9 12| A5 Vcc |10 11| A4 +--------+ ZIP20 ^ *G 1 | | 2 *CAS DQ3 3 | | 4 DQ4 Vss 5 | | 6 DQ1 DQ2 7 | | 8 *W *RAS 9 | | 10 NC A0 11 | | 12 A1 A2 13 | | 14 A3 Vcc 15 | | 16 A4 A5 17 | | 18 A6 A7 19 | | 20 A8 -
External links
Files
-
KM4C256 KM4C258 Datasheet