Intel 81342 Developer's Manual page 589

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D D R S D R A M M e m o r y C o n t r o l l e r — I n t e l
7 . 3 . 3 . 5
P a g e H i t / M i s s D e t e r m i n a t i o n
T h e D M C U a d d r e s s t r a n s l a t i o n a s s u m e s a 8 K b y t e p a g e . F o r 3 2 - b i t m o d e , t h e D M C U
a d d r e s s t r a n s l a t i o n a s s u m e s a 4 K b y t e p a g e . F o r 5 1 2 M b i t D D R 2 d e v i c e s , t h e D M C U
k e e p s f o u r p a g e s p e r b a n k ( 8 m a x i m u m ) o p e n s i m u l t a n e o u s l y . A n d f o r 1 G b i t a n d
2 G b i t D D R 2 d e v i c e s , t h e D M C U k e e p s e i g h t p a g e s p e r b a n k ( 1 6 m a x i m u m ) o p e n
s i m u l t a n e o u s l y .
F o r 5 1 2 M b i t D D R 2 d e v i c e s , t h e D M C U k e e p s o n l y o n e p a g e e a c h o f B a n k 0 ( L e a f [ 0 : 3 ] )
a n d B a n k 1 ( L e a f [ 0 : 3 ] ) o p e n s i m u l t a n e o u s l y .
F o r 1 G b i t a n d 2 G b i t D D R 2 d e v i c e s , t h e D M C U k e e p s o n l y o n e p a g e e a c h o f B a n k 0
( L e a f [ 0 : 7 ] ) a n d B a n k 1 ( L e a f [ 0 : 7 ] ) o p e n s i m u l t a n e o u s l y . S e e
o r g a n i z a t i o n u s i n g 1 G b i t a n d 2 G b i t d e v i c e s .
D e c e m b e r 2 0 0 7
O r d e r N u m b e r : 3 1 5 0 3 7 - 0 0 2 U S
®
8 1 3 4 1 a n d 8 1 3 4 2
F i g u r e 8 5
f o r a n e x a m p l e
®
I n t e l
8 1 3 4 1 a n d 8 1 3 4 2 I / O P r o c e s s o r s
D e v e l o p e r ' s M a n u a l
5 8 9

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