參數(shù)資料
型號: UPD44647094F5-E30-FQ1
元件分類: SRAM
英文描述: 8M X 9 QDR SRAM, 0.45 ns, PBGA165
封裝: 15 X 17 MM, PLASTIC, BGA-165
文件頁數(shù): 3/36頁
文件大小: 479K
代理商: UPD44647094F5-E30-FQ1
11
Preliminary Data Sheet M18526EJ1V0DS
μPD44647094,44647184,44647364, 44647096,44647186,44647366
Truth Table
2.0 Cycle Read Latency
[
μPD44647094], [μPD44647184], [μPD44647364]
Operation
CLK
R#
W#
D or Q
WRITE cycle
L
→ H
H
L
Data in
Load address, input write data on two
Input data
DA(A+0)
DA(A+1)
DA(A+2)
DA(A+3)
consecutive K and K# rising edge
Input clock
K(t+1)
K#(t+1)
K(t+2)
K#(t+2)
READ cycle
L
→ H
L
X
Data out
Load address, read data on two
Output data
QA(A+0)
QA(A+1)
QA(A+2)
QA(A+3)
consecutive K and K# rising edge
Output clock
K(t+2)
K#(t+2)
K(t+3)
K#(t+3)
NOP (No operation)
L
→ H
H
D = X, Q = High-Z
Clock stop
Stopped
X
Previous state
2.5 Cycle Read Latency
[
μPD44647096], [μPD44647186], [μPD44647366]
Operation
CLK
R#
W#
D or Q
WRITE cycle
L
→ H
H
L
Data in
Load address, input write data on two
Input data
DA(A+0)
DA(A+1)
DA(A+2)
DA(A+3)
consecutive K and K# rising edge
Input clock
K(t+1)
K#(t+1)
K(t+2)
K#(t+2)
READ cycle
L
→ H
L
X
Data out
Load address, read data on two
Output data
QA(A+0)
QA(A+1)
QA(A+2)
QA(A+3)
consecutive K and K# rising edge
Output clock
K#(t+2)
K(t+3)
K#(t+3)
K(t+4)
NOP (No operation)
L
→ H
H
D = X, Q = High-Z
Clock stop
Stopped
X
Previous state
Remarks
Remarks listed below are for both products with 2.0 and 2.5 Cycle Read Latency.
1. H : HIGH, L : LOW,
× : don’t care, ↑ : rising edge.
2. Data inputs are registered at K and K# rising edges. Data outputs are delivered at K and K# rising edges.
3. R# and W# must meet setup/hold times around the rising edge (LOW to HIGH) of K and are registered at
the rising edge of K.
4. This device contains circuitry that ensure the outputs to be in high impedance during power-up.
5. Refer to state diagram and timing diagrams for clarification.
6. It is recommended that K = K# when clock is stopped. This is not essential but permits most rapid restart
by overcoming transmission line charging symmetrically.
7. If R# was LOW to initiate the previous cycle, this signal becomes a don't care for this WRITE operation
however it is strongly recommended that this signal is brought HIGH as shown in the truth table.
8. W# during write cycle and R# during read cycle were HIGH on previous K clock rising edge. Initiating
consecutive READ or WRITE operations on consecutive K clock rising edges is not permitted. The
device will ignore the second request.
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