m52d128168a Elite Semiconductor Memory Technology Inc., m52d128168a Datasheet - Page 18

• Manufacturer Part Number: m52d128168a
• Description: 2m X 16 Bit X 4 Banks Mobile Synchronous Dram
• Manufacturer: Elite Semiconductor Memory Technology Inc.

BASIC FEATURE AND FUNCTION DESCRIPTIONS
1. CLOCK Suspend
2. DQM Operation
Elite Semiconductor Memory Technology Inc.
I n t e r n a l
D Q ( C L 3 )
*Note: 1. CKE to CLK disable/enable = 1CLK.
D Q ( C L 2 )
C L K
I nt e r n al
DQ ( C L 2 )
DQ ( C L 3 )
D Q ( C L 3 )
D Q M
D Q ( C L 2 )
C M D
C K E
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
CL K
CM D
CK E
C L K
C M D
D Q M
2. DQM masks data out Hi-Z after 2CLKs which should masked by CKE ”L”.
3. DQM masks both data-in and data-out.
C L K
R D
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 )
1 ) W r i t e M a s k ( B L = 4 )
W R
W R
D0
D 0
D 0
D 0
D1
D Q M t o D a t a - i n M a s k = 0
D 1
D 1
D 1
Q0
N o t W r i tt e n
M a s k e d b y C K E
M a s k e d b y D Q M
H i - Z
H i - Z
D 3
D 3
D2
D 2
D 3
D3
* N o t e 2
Q2
Q1
H i - Z
H i - Z
2 ) R e a d M a s k ( 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 )
Q4
Q3
R D
R D
H i - Z
H i - Z
Q0
Q 0
M a s k e d b y D Q M
H i - Z
H i - Z
Q5
Q6
Q 1
Q 0
Publication Date: Aug. 2009
Revision: 1.3
D Q M t o D a t a - o u t M a s k = 2
Q6
Q2
Q7
M52D128168A
Q1
Q 2
Q 1
Q8
Q7
Q2
Su s pe nd ed D ou t
Q3
Q9
Q8
Q3
Q 3
Q 2
Q 3
18/48