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IS61LV632A Datasheet, PDF (4/16 Pages) Integrated Silicon Solution, Inc – 32K x 32 SYNCHRONOUS FAST STATIC RAM
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IS61LV632A
ISSI ®
TRUTH TABLE
OPERATION
Deselected, Power-down
ADDRESS
USED
CE1 CE2 CE3 ADSP ADSC ADV WRITE OE DQ
None
H
X
X
X
L
X
X
X High-Z
Deselected, Power-down
None
L
L
X
L
X
X
X
X High-Z
Deselected, Power-down
None
L
X
H
L
X
X
X
X High-Z
Deselected, Power-down
None
L
L
X
H
L
X
X
X High-Z
Deselected, Power-down
None
L
X
H
H
L
X
X
X High-Z
Read Cycle, Begin Burst
External
L
H
L
L
X
X
X
L
Q
Read Cycle, Begin Burst
External
L
H
L
L
X
X
X
H High-Z
Write Cycle, Begin Burst
External
L
H
L
H
L
X
L
X
D
Read Cycle, Begin Burst
External
L
H
L
H
L
X
H
L
Q
Read Cycle, Begin Burst
External
L
H
L
H
L
X
H
H High-Z
Read Cycle, Continue Burst
Read Cycle, Continue Burst
Read Cycle, Continue Burst
Read Cycle, Continue Burst
Next
Next
Next
Next
XX
X
H
H
L
H
L
Q
XX
X
H
H
L
H
H High-Z
HX
X
X
H
L
H
L
Q
HX
X
X
H
L
H
H High-Z
Write Cycle, Continue Burst Next
XX
X
H
H
L
L
X
D
Write Cycle, Continue Burst Next
HX
X
X
H
L
L
X
D
Read Cycle, Suspend Burst Current
XX
X
H
H
H
H
L
Q
Read Cycle, Suspend Burst Current
XX
X
H
H
H
H
H High-Z
Read Cycle, Suspend Burst Current
HX
X
X
H
H
H
L
Q
Read Cycle, Suspend Burst Current
Write Cycle, Suspend Burst Current
HX
X
X
H
H
H
H High-Z
XX
X
H
H
H
L
X
D
Write Cycle, Suspend Burst Current
HX
X
X
H
H
L
X
D
Notes:
1. All inputs except OE must meet setup and hold times for the Low-to-High transition of clock (CLK).
2. Wait states are inserted by suspending burst.
3. X means don't care. WRITE=L means any one or more byte write enable signals (BW1-BW4) and BWE are LOW or GW is LOW.
WRITE=H means all byte write enable signals are HIGH.
4. For a Write operation following a Read operation, OE must be HIGH before the input data required setup time and held HIGH
throughout the input data hold time.
5. ADSP LOW always initiates an internal READ at the Low-to-High edge of clock. A WRITE is performed by setting one or more
byte write enable signals and BWE LOW or GW LOW for the subsequent L-H edge of clock.
PARTIAL TRUTH TABLE
FUNCTION
GW BWE
READ
READ
WRITE Byte 1
WRITE All Bytes
WRITE All Bytes
H
H
H
X
H
L
X
L
L
X
BW1
X
H
L
L
X
BW2
X
H
H
L
X
BW3
X
H
H
L
X
BW4
X
H
H
L
X
4
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. A
04/17/01
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