upd44645184af5-fq1-a Renesas Electronics Corporation., upd44645184af5-fq1-a Datasheet - Page 11

• Manufacturer Part Number: upd44645184af5-fq1-a
• Description: 72m-bit Qdrtm Ii Sram 4-word Burst Operation
• Manufacturer: Renesas Electronics Corporation.

Truth Table
Remarks 1. H : HIGH, L : LOW, × : don’t care, ↑ : rising edge.
WRITE cycle
Load address, input write data on
consecutive K and K# rising edge
READ cycle
Load address, read data on
consecutive C and C# rising edge
NOP (No operation)
Clock stop
2. Data inputs are registered at K and K# rising edges. Data outputs are delivered at C and C# rising edges
3. All control inputs in the truth table must meet setup/hold times around the rising edge (LOW to HIGH) of
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# = C = C# when clock is stopped. This is not essential but permits most
7. If R# was LOW to initiate the previous cycle, this signal becomes a don't care for this WRITE operation
8. W# during write cycle and R# during read cycle were HIGH on previous K clock rising edge. Initiating
Operation
except if C and C# are HIGH then data outputs are delivered at K and K# rising edges.
K. All control inputs are registered during the rising edge of K.
rapid restart by overcoming transmission line charging symmetrically.
however it is strongly recommended that this signal is brought HIGH as shown in the truth table.
consecutive READ or WRITE operations on consecutive K clock rising edges is not permitted. The
device will ignore the second request.
Stopped
L → H
L → H
L → H
CLK
Preliminary Data Sheet M19959EJ1V0DS
R#
H
H
L
×
μ
W#
PD44645094A-A, 44645184A-A, 44645364A-A
H
L
×
×
Data in
Data out
D = ×, Q = High-Z
Previous state
Output clock
Output data
Input clock
Input data
D or Q
C#(t+1) ↑
K(t+1) ↑
Q
D
A
A
(A+0)
(A+0)
K#(t+1) ↑
Q
C(t+2) ↑
D
A
A
(A+1)
(A+1)
C#(t+2) ↑
D
K(t+2) ↑
Q
A
A
(A+2)
(A+2)
K#(t+2) ↑
D
Q
C(t+3) ↑
A
A
(A+3)
(A+3)
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