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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 Up Sequence
1. As for PD , being maintained by the low state (<0.2V) is desirable before a power-supply injection.
2 . A p p l y V
DD
b e f o r e o r a t t h e s a m e t i m e a s V
DDQ
.
3 . A p p l y V
D D Q
b e f o r e o r a t t h e s a m e t i m e a s V
R E F
.
4. Start clock (CLK, C L K ) and maintain stable condition for 200us (min.).
5. After stable power and clock, apply DESL and take PD = H.
6. Issue EMRS to enable DLL and to define driver strength and data strobe type. (Note : 1)
7. Issue MRS for set C A S Latency (CL), Burst Type (BT), and Burst Length (BL). (Note : 1)
8. Issue two or more Auto-Refresh commands. (Note:1)
9. Ready for normal operation after 200 clocks from Extended Mode Register programming.
Note :
1. Sequence 6, 7 and 8 can be issued in random order.
2. L=Logic Low, H = Logic High
2.5V(TYP)
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V DD
1.8V(TYP)
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V DDQ
0.9V(TYP)
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V REF
CLK
CLK
200
碌
s(min)
PD
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t
P D E X
I
P D A
l
R S C
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l
R S C
l
R E F C
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l
R E F C
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200 clock cycle(min)
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Command
DESL
RDA MRS
DESL
RDA MRS
DESL
WRA REF
DESL
WRA REF
DESL
op-code
op-code
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Address
EMRS
MRS
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DQ
鈭?/div>
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鈭?/div>
鈭?/div>
鈭?/div>
DS
Hi-Z
QS
(Uni-QS mode)
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鈭?/div>
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鈭?/div>
鈭?/div>
鈭?/div>
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鈭?/div>
鈭?/div>
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Low
QS
(Free Running mode)
EMRS
MRS
Auto Refresh cycle
Normal Operation
- 12 -
REV. 0.0 Nov. 2002

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