ESMT
M12L2561616A (2K)
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 )
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 )
CL K
C M D
C K E
W R
R D
M as k e d b y CK E
I nt ern al
CLK
D2
D 3
D Q ( C L 2 )
D Q ( C L 3 )
D 0
D0
Q3
Q3
D 1
D 1
Q1
Q1
Q0
Q2
Q2
D 2
D 3
Q0
N ot W ri t t e n
Suspe nded Dout
2. DQM Operation
2 ) R e a d M a s k ( B L = 4 )
1 ) W r i t e M a s k ( B L = 4 )
CL K
C M D
R D
W R
D Q M
DQ ( C L 2 )
DQ ( C L 3 )
M a s k e d b y D Q M
M a s k e d b y D Q M
H i - Z
D0
D1
Q2
Q3
Q2
D3
Q0
H i - Z
D3
D1
D0
Q1
Q3
DQ M t o D at a-i n M ask = 0
DQ M to D at a- ou t M ask = 2
* N o t e 2
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 )
CLK
R D
C M D
CK E
I nter na l
CLK
D Q M
H i - Z
H i - Z
H i - Z
H i - Z
H i - Z
Q4
Q3
Q6
Q5
Q7
Q6
Q2
Q8
Q7
Q0
DQ ( C L 2 )
DQ ( C L 3 )
H i - Z
Q1
*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.
Publication Date: Jun. 2012
Revision: 1.4 16/45
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
