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參數(shù)資料
| 型號： | UPD44325082 |
| 廠商： | NEC Corp. |
| 英文描述： | 36M-BIT QDRII SRAM 2-WORD BURST OPERATION |
| 中文描述： | 36M條位推出QDRII SRAM的2字爆發(fā)運作 |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 357K |
| 代理商： | UPD44325082 |
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10
Preliminary Data Sheet
M16783EJ1V0DS
μ
PD44325082, 44325092, 44325182, 44325362
Truth Table
Operation
CLK
/R
/W
D or Q
WRITE cycle
L
→
H
X
L
Data in
Load address, input write data on
Input data
D
A
(A+0)
D
A
(A+1)
consecutive K and /K rising edge
Input clock
K( t )
↑
/K( t )
↑
READ cycle
L
→
H
L
X
Data out
Load address, output data on
Output data
Q
A
(A+0)
Q
A
(A+1)
consecutive C and /C rising edge
Output clock
/C(t+1)
↑
C(t+2)
↑
NOP (No operation)
L
→
H
H
H
D=X or Q=High-Z
STANDBY(Clock stopped)
Stopped
X
X
Previous state
Remarks 1.
H : High level, L : Low level,
×
: don’t care,
↑
: rising edge.
2.
Data inputs are registered at K and /K rising edges. Data outputs are delivered at C and /C rising edges
except if C and /C are HIGH then Data outputs are delivered at K and /K rising edges.
3.
All control inputs in the truth table must meet setup/hold times around the rising edge (LOW to HIGH) of
K. All control inputs are registered during the rising edge of K.
4.
This device contains circuitry that will ensure the outputs will be in high impedance during power-up.
5.
Refer to state diagram and timing diagrams for clarification.
6.
It is recommended that K = /(/K) = C = /(/C) when clock is stopped. This is not essential but permits most
rapid restart by overcoming transmission line charging symmetrically.
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