Table of Contents
Advertisement
ESMT
BASIC FEATURE AND FUNCTION DESCRIPTIONS
1. CLOCK Suspend
1 ) C l o c k S u s p e n d e d D u r i n g W r i t e ( B L = 4 )
C L K
CM D
W R
CK E
I nt e r n al
CL K
DQ ( C L 2 )
D0
DQ ( C L 3 )
D 0
2. DQM Operation
1 ) W r i t e M a s k ( B L = 4 )
C L K
C M D
W R
D Q M
D Q ( C L 2 )
D 0
D Q ( C L 3 )
D 0
3 ) D Q M w i t h c l c o k s u s p e n d e d ( F u l l P a g e R e a d )
C L K
C M D
R D
C K E
I n t e r n a l
C L K
D Q M
D Q ( C L 2 )
D Q ( C L 3 )
*Note :1. CKE to CLK disable/enable = 1CLK.
2. DQM masks data out Hi-Z after 2CLKs which should masked by CKE "L".
3. DQM masks both data-in and data-out.
Elite Semiconductor Memory Technology Inc.
M a s k e d b y C K E
D 3
D 2
D1
D 1
D2
D3
N o t W r i tt e n
M a s k e d b y D Q M
D 1
D 3
D 1
D 3
D Q M t o D a t a - i n M a s k = 0
* N o t e 2
H i - Z
Q0
Q2
H i - Z
Q1
2 ) C l o c k S u s p e n d e d D u r i n g R e a d ( B L = 4 )
R D
Q 0
2 ) R e a d M a s k ( B L = 4 )
R D
M a s k e d b y D Q M
H i - Z
Q0
H i - Z
H i - Z
H i - Z
Q4
Q6
H i - Z
H i - Z
Q3
Q5
M12L64164A
Q 1
Q 2
Q 3
Q 3
Q 0
Q 1
Q 2
Su s pe nd ed D ou t
Q3
Q2
Q1
Q2
Q3
D Q M t o D a t a - o u t M a s k = 2
Q8
Q9
Q7
Q7
Q8
Q6
Publication Date: May 2008
Revision: 3.3
18/46
Advertisement
Table of Contents
