Difference between revisions of "Talk:6264 static RAM"

From Nesdev wiki
Jump to navigationJump to search
m (→‎More pinouts for different sizes of 62* SRAM's: Added all DIPs upto 256KB (2048K by 8b))
Line 79: Line 79:
 
A16      A13<br>
 
A16      A13<br>
 
A15      A14<br>
 
A15      A14<br>
 +
<br>
 +
DS1249Y SRAM (32 pins, 1-16, 32-17) Note that this is equivalent to 622048 but AFAICT, no one makes those.<br>
 +
NC        +5V<br>
 +
A16      A15<br>
 +
A14      A17<br>
 +
A12      !WE<br>
 +
A7        A13<br>
 +
A6        A8<br>
 +
A5        A9<br>
 +
A4        A11<br>
 +
A3        !OE<br>
 +
A2        A10<br>
 +
A1        !CS<br>
 +
A0        D7<br>
 +
D0        D6<br>
 +
D1        D5<br>
 +
D2        D4<br>
 +
Gnd      D3<br>
 
<br>
 
<br>
 
These would need to be edited to match formatting of the existing Wiki article.<br>
 
These would need to be edited to match formatting of the existing Wiki article.<br>

Revision as of 17:09, 30 August 2014

More pinouts for different sizes of 62* SRAM's

Some extra pinouts for SRAMs: 62256 is identical except for the !CS2 input and NC becoming address lines. This is to make address expansion of a board design almost trivial using inverters as half of an address decoder (other half is !CS input).

CY62256 SRAM (28 pins, 1-14,28-15) Note that the Ax and Dx line order doesn't really matter.
A5 +5V
A6 !WE
A7 A4
A8 A3
A9 A2
A10 A1
A11 !OE
A12 A0
A13 !CS
A14 D7
D0 D6
D1 D5
D2 D4
Gnd D3

62512 SRAM (32 pins, 1-16, 32-17)
A18 +5V
A16 A15
A14 A17
A12 /WE
A7 A13
A6 A8
A5 A9
A4 A11
A3 /OE
A2 A10
A1 /CS
A0 D7
D0 D6
D1 D5
D2 D4
Gnd D3

621024 SRAM (32 pins, 1-16, 32-17)
NC +5V
A16 A15
A14 CS2
A12 /WE
A7 A13
A6 A8
A5 A9
A4 A11
A3 /OE
A2 A10
A1 /CS1
A0 D7
D0 D6
D1 D5
D2 D4
Gnd D3

LY6220488 TSOP-package SRAM (44 pins, 1-22, 23-44)
A4 A5
A3 A6
A2 A7
A1 !OE
A0 CS2
!CS A8
NC NC
NC NC
D0 D7
D1 D6
+5V Gnd
Gnd +5V
D2 D5
D3 D4
NC NC
A20 NC
!WE A9
A19 A10
A18 A11
A17 A12
A16 A13
A15 A14

DS1249Y SRAM (32 pins, 1-16, 32-17) Note that this is equivalent to 622048 but AFAICT, no one makes those.
NC +5V
A16 A15
A14 A17
A12 !WE
A7 A13
A6 A8
A5 A9
A4 A11
A3 !OE
A2 A10
A1 !CS
A0 D7
D0 D6
D1 D5
D2 D4
Gnd D3

These would need to be edited to match formatting of the existing Wiki article.