IBM11D1475B IBM11D2475B
IBM11E1475B IBM11E2475B
1M/2M x 32 Desktop ECC-on-SIMM
Truth Table
Row
Address
Column
Address
Function
RAS
CAS
WE
All DQ bits
Standby
Read
H
L
L
H→X
X
H
L
X
X
High Impedance
Valid Data Out
Valid Data In
L
L
Row
Row
Col
Col
Early-Write
EDO Mode - Read:
1st Cycle
H→L
H→L
H→L
L
L
L
H
H
L
Row
N/A
Col
Col
Col
Valid Data Out
Valid Data Out
Valid Data In
Subsequent Cycles
EDO Mode - Write:
1st Cycle
Row
H→L
Subsequent Cycles
RAS-Only Refresh
L
L
X
H
H
L
N/A
Row
X
Col
N/A
X
Valid Data In
High Impedance
High Impedance
Data Out
L
H
L
L
L
H→L
CAS-Before-RAS Refresh
L→H→L
L→H→L
Read
Row
Row
Col
Col
Hidden Refresh
Write
Data In
Presence Detect
1M x 32
2M x 32
-6R
Pin
-6R
VSS
VSS
NC
NC
PD1
PD2
PD3
PD4
NC
NC
NC
NC
1. NC= OPEN, V = GND
ss
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
75H3507
SA14-4343-00
Released 6/96
Page 4 of 22
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