參數(shù)資料
型號： K4C89363AF-GCF6
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network-DRAM
中文描述： 2097152 - 4字×銀行× 36位的雙數(shù)據(jù)速率網(wǎng)絡(luò)內(nèi)存
文件頁數(shù)： 56/58頁
文件大?。?/td> 1340K
代理商： K4C89363AF-GCF6
K4C89363AF
REV. 0.0 Nov. 2002
- 56 -
Extended Mode Register Fields
( E - 1 ) D L L S w i t c h f i e l d ( A 0 )
T h i s b i t i s u s e d t o e n a b l e D L L . W h e n t h e A 0 b i t i s s e t " 0 " , D L L i s e n a b l e d .
( E - 2 ) O u t p u t D r i v e r I m p e d a n c e C o n t r o l f i e l d ( A 1 t o A 4 )
T h i s f i e l d i s u s e d t o c h o o s e O u t p u t D r i v e r S t r e n g t h . F o u r t y p e s o f D r i v e r S t r e n g t h a r e s u p p o r t e d . Q S a n d D Q D r i v e r
S t r e n g t h c a n b e c h o s e n s e p a r a t e l y . A 2 - A 1 s p e c i f i e d t h e D Q D r i v e r S t r e n g t h . A 4 - A 3 s p e c i f i e d t h e Q S D r i v e r S t r e n g t h .
( E - 3 ) S t r o b e S e l e c t ( A 6 / A 5 )
T w o t y p e s o f s t r o b e a r e s u p p o r t e d . T h i s f i e l d i s u s e d t o c h o o s e t h e t y p e o f d a t a s t r o b e .
( 1 ) U n i d i r e c t i o n a l D S / Q S m o d e
D a t a s t r o b e i s s e p a r a t e d D S f o r w r i t e s t r o b e a n d Q S f o r r e a d s t r o b e .
D S i s u s e d t o s a m p l e w r i t e d a t a a t w r i t e o p e r a t i o n . Q S i s a l i g n e d w i t h r e a d d a t a a t R e a d o p e r a t i o n .
( 2 ) U n i d i r e c t i o n a l D S / F r e e r u n n i n g Q S m o d e
D a t a s t r o b e i s s e p a r a t e d D S f o r w r i t e s t r o b e a n d Q S f o r r e a d s t r o b e .
D S i s u s e d t o s a m p l e w r i t e d a t a a t w r i t e o p e r a t i o n . Q S i s a l i g n e d w i t h r e a d d a t a a n d a l w a y s c l o c k i n g
( E - 4 ) R e s e r v e d f i e d ( A 7 t o A 1 4 )
T h e s e b i t s a r e r e s e r v e d f o r f u t u r e o p e r a t i o n s a n d m u s t b e s e t t o " 0 " f o r n o r m a l o p e r a t i o n .
Q S
D Q
Output Driver Impedance Control
A4
A3
A2
A 1
0
0
0
0
N o r m a l O u t p u t D r i v e r
0
1
0
1
S t r o n g O u t p u t D r i v e r
1
0
1
0
W e a k e r O u t p u t D r i v e r
1
1
1
1
R e s e r v e d
A6
A5
Strobe Select
0
0
R e s e r v e d
0
1
R e s e r v e d
1
0
U n i d i r e c t i o n a l D S / Q S m o d e
1
1
U n i d i r e c t i o n a l D S / F r e e r u n n i n g Q S m o d e
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