|
IC41C1664 Datasheet, PDF (4/21 Pages) Integrated Circuit Solution Inc – 64K x 16 bit Dynamic RAM with EDO Page Mode | |||
|
◁ |
IC41C1664
IC41LV1664
TRUTH TABLE
Function
Standby
Read: Word
Read: Lower Byte
RAS
H
L
L
LCAS UCAS WE
H
H
X
L
L
H
L
H
H
OE Address tR/tC
X
X
L ROW/COL
L ROW/COL
Read: Upper Byte
L
H
L
H
L ROW/COL
Write: Word (Early Write)
Write: Lower Byte (Early Write)
L
L
L
L
X ROW/COL
L
L
H
L
X ROW/COL
Write: Upper Byte (Early Write)
L
H
L
L
X ROW/COL
Read-Write(1,2)
L
L
L HâL LâH ROW/COL
EDO Page-Mode Read(2) 1st Cycle: L
2nd Cycle: L
Any Cycle: L
HâL HâL H
HâL HâL H
LâH LâH H
L
ROW/COL
L
NA/COL
L
NA/NA
EDO Page-Mode Write(1) 1st Cycle: L
2nd Cycle: L
HâL HâL L
HâL HâL L
X ROW/COL
X
NA/COL
EDO Page-Mode
Read-Write(1,2)
1st Cycle: L
2nd Cycle: L
HâL HâL HâL LâH ROW/COL
HâL HâL HâL LâH NA/COL
Hidden Refresh(2)
RAS-Only Refresh
Read LâHâL L
L
H
L
ROW/COL
Write LâHâL L
L
L
X ROW/COL
L
H
H
X
X
ROW/NA
CBR Refresh(3)
HâL
L
L
X
X
X
Notes:
1. These WRITE cycles may also be BYTE WRITE cycles (either LCAS or UCAS active).
2. These READ cycles may also be BYTE READ cycles (either LCAS or UCAS active).
3. At least one of the two CAS signals must be active (LCAS or UCAS).
I/O
High-Z
DOUT
Lower Byte, DOUT
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, DOUT
DIN
Lower Byte, DIN
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, DIN
DOUT, DIN
DOUT
DOUT
DOUT
DIN
DIN
DOUT, DIN
DOUT, DIN
DOUT
DOUT
High-Z
High-Z
4
Integrated Circuit Solution Inc.
DR033-0A 11/15/2001
|
▷ |