WED2DL32512V40BC データシートの表示（PDF） - White Electronic Designs Corporation
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WED2DL32512V40BC Datasheet PDF : 9 Pages
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WED2DL32512V
INTERLEAVED BURST TABLE (MODE = NC OR HIGH)
First Address
External
X...X00
X...X01
X...X10
X...X11
Second Address
Internal
X...X01
X....X00
X...X11
X...X10
Third Address
Internal
X...X10
X...X11
X...X00
X...X01
Fourth Address
Internal
X...X11
X...X10
X...X01
X...X00
INTERLEAVED BURST TABLE (MODE = LOW)
First Address
External
X...X00
X...X01
X...X10
X...X11
Second Address
Internal
X...X01
X....X10
X...X11
X...X00
Third Address
Internal
X...X10
X...X11
X...X00
X...X01
Fourth Address
Internal
X...X11
X...X00
X...X01
X...X10
TRUTH TABLE
Function
Deselected Cycle, Power-Down
Deselected Cycle, Power-Down
SNOOZE MODE, Power-Down
WRITE Cycle, Begin Burst
READ Cycle, Begin Burst
READ Cycle, Begin Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
WRITE Cycle, Suspend Burst
WRITE Cycle, Suspend Burst
Address
CE
ZZ
ADSC
WRITE
OE
CLK
Used
None
H
L
L
X
X
L-H
None
L
L
L
X
X
L-H
None
X
H
X
X
X
X
External
L
L
L
L
X
L-H
External
L
L
L
H
L
L-H
External
L
L
L
H
H
L-H
Current
X
L
H
H
L
L-H
Current
X
L
H
H
H
L-H
Current
H
L
H
H
L
L-H
Current
H
L
H
H
H
L-H
Current
X
L
H
L
X
L-H
Current
H
L
H
L
X
L-H
NOTES:
1. X means “Don’t Care.” —— means active LOW. H means logic HIGH. L means logic LOW.
2. For WRITE, L means any one or more byte write enable signals (BWa, BWb, BWc or BWd) and BWE are LOW.
3. BWa enables WRITEs to DQa’s and DQPa. BWb enables WRITEs to DQb’s. BWc enables WRITEs to DQc’s. BWd enables WRITEs to DQd’s.
4. All inputs except OE and ZZ must meet setup and hold times around the rising edge (LOW to HIGH) of CLK.
5. Wait states are inserted by suspending burst.
6. For a WRITE operation following a READ operation, OE must be HIGH before the input data setup time and held HIGH throughout the input data hold time.
7. This device contains circuitry that will ensure the outputs will be in High-Z during power-up.
DQ
High-Z
High-Z
High-Z
D
Q
High-Z
Q
High-Z
Q
High-Z
D
D
3
White Electronic Designs Corporation • (508) 366-5151 • www.whiteedc.com
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