M12L128324A-2M Datasheet, PDF (16/44 Pages) Elite Semiconductor Memory Technology Inc. – JEDEC standard 3.3V power supply

ESMT
M12L128324A (2M)
BASIC FEATURE AND FUNCTION DESCRIPTIONS
1. CLOCK Suspend
1) Clock Suspended During Write (BL=4)
CLK
2) Clock Suspended During Read (BL=4)
CMD
WR
RD
CKE
Internal
CLK
DQ(CL2)
Masked by CKE
D0 D1
D2 D3
Q0 Q1
Q2
Q3
DQ(CL3)
D0 D1
D2 D3
Q0 Q1
Q2
Q3
Not Written
Suspended Dout
2. DQM Operation
CLK
1)Write Mask (BL=4)
CMD
WR
DQM
DQ(CL2)
D0 D1
Masked b y DQ M
D3
DQ(CL3)
D0 D1
D3
DQM to Data-in Mask=0
2)Read Mask (BL=4)
RD
Masked by DQM
Hi-Z
Q0
Q2 Q3
Hi-Z
Q1 Q2 Q3
DQM to Data-out Mask=2
3)DQM with clcok suspended (Full Page Read)
*Note2
CLK
CMD
RD
CKE
Internal
CLK
DQM
DQ(CL2)
DQ(CL3)
Hi-Z
Q0
Q2
Hi-Z
Q1
Hi-Z
Q4
Hi-Z
Q3
Hi-Z
Hi-Z
Q6 Q7 Q8
Q5 Q6 Q7
*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: Mar. 2011
Revision: 1.2
16/44