A42U2604 Datasheet, PDF (5/25 Pages) AMIC Technology – 4M X 4 CMOS DYNAMIC RAM WITH EDO PAGE MODE

Truth Table
Function
Standby
Read: Word
Read
Write: Word (Early)
Write (Early)
Read-Write
EDO-Page-Mode Read: Hi-Z
-First cycle
-Subsequent Cycles
EDO-Page-Mode Write(Early)
-First cycle
-Subsequent Cycles
EDO-Page-Mode Read-Write
-First cycle
-Subsequent Cycles
Hidden Refresh Read
Hidden Refresh Write
RAS -Only Refresh
CBR Refresh
Self Refresh
RAS
H
L
L
L
L
L
CAS
H
L
L
L
L
L
L
H→L
L
H→L
L
H→L
L
H→L
L
L
L→H→L
L→H→L
L
H→L
H→L
H→L
H→L
L
L
H
L
L
WE
X
H
H
L
L
H→L
H
H
L
L
H→L
H→L
H
L
X
X
H
OE
X
L
L
X
X
L→H
H→L
H→L
X
X
L→H
L→H
L
X
X
X
X
A42U2604 Series
Address
X
Row/Col.
Row/Col.
Row/Col.
Row/Col.
Row/Col.
Row/Col.
Col.
Row/Col.
Col.
Row/Col.
Col.
Row/Col.
Row/Col.
Row
X
X
I/Os
High-Z
Data Out
Data Out
Data In
Data In
Data Out → Data In
Data Out
Data Out
Data In
Data In
Data Out → Data In
Data Out → Data In
Data Out
Data In → High-Z
High-Z
High-Z
High-Z
PRELIMINARY (June, 2002, Version 0.3)
4
AMIC Technology, Inc.