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K4C89323AF-TCFB Datasheet

  • K4C89323AF-TCFB

  • 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network...

  • 58頁

  • SAMSUNG   SAMSUNG

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K4C89363AF
Power Down Timing (CL=4, BL=4)
Read cycle to Power Down Mode
0
CLK
CLK
1
2
3
4
5
6
7
8
9
10
n-1
n
n+1
n+2
n+3
鈭?/div>
鈭?/div>
BL=2, SEQUENTIAL MODE
Command
RDA
LAL
DESL
鈭?/div>
鈭?/div>
鈭?/div>
鈭?/div>
DESL
I
P D A
RDA
or
WRA
Address
UA
LA
t
I S
I
P D
=2 cycle
UA
t
IH
PD
t
Q P D H
Unidirectional DS/QS mode
I
R C ( m i n ) ,
t
R E F I ( m a x )
鈭?/div>
鈭?/div>
t
PDEX
鈭?/div>
鈭?/div>
LDS/UDS
(Input)
LQS/UQS
(Output)
Low
CL=4
鈭?/div>
鈭?/div>
DQ
(Output)
Hi-Z
Q0
Q1 Q2
Q3
Hi-Z
鈭?/div>
鈭?/div>
Unidirectional DS/Free Running QS mode
鈭?/div>
鈭?/div>
LDS/UDS
(Input)
鈭?/div>
鈭?/div>
LQS/UQS
(Output)
CL=4
DQ
(Output)
Hi-Z
Q0
Q1 Q2
Q3
Hi-Z
鈭?/div>
鈭?/div>
Power Down Entry
Power Down Exit
Note : P D must be kept "High" level until end of Burst data output.
P D should be brought to "High" within t
R E F I
(max.) to maintain the data written into cell.
In Power Down Mode, P D "Low" and a stable clock signal must be maintained.
W h e n PD is brought to "High", a valid executable command may be applied I
P D A
cycles later.
- 41 -
REV. 0.0 Sep. 2002

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