參數(shù)資料
型號(hào): M12L2561616A
廠商: Elite Semiconductor Memory Technology Inc.
英文描述: 4M x 16 Bit x 4 Banks Synchronous DRAM
中文描述: 4米× 16位× 4個(gè)銀行同步DRAM
文件頁數(shù): 16/44頁
文件大小: 908K
代理商: M12L2561616A
ES MT
BASIC FEATURE AND FUNCTION DESCRIPTIONS
1. CLOCK Suspend
M12L2561616A
Elite Semiconductor Memory Technology Inc.
Revision
:
1.2
Publication Date
:
Aug. 2007
16/44
2. DQM Operation
*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.
CLK
C M D
DQ M
DQ( CL2)
DQ( CL3)
R D
Q0
Q2
Q3
Q1
Q2
Q3
D0
D1
D3
D1
D3
D0
W R
Ma s k e d b y D Q M
Ma s k e d b y D Q M
CLK
C M D
DQ M
DQ( CL2)
DQ( CL3)
CKE
R D
Q0
Q2
Q4
Hi - Z
Hi - Z
Hi - Z
Q6
Q7
Q8
Q5
Q6
Q7
Q1
Q3
Hi - Z
Hi - Z
Hi - Z
Hi - Z
Hi - Z
1 ) W r i t e M a s k ( B L = 4 )
2) R e ad M as k ( B L = 4 )
DQM to Data-in M ask= 0
DQM to Data- out Mask=2
3) D Q M wi t h c l c ok s u s p en d ed ( F u l l P a g e Re ad )
* Not e 2
Internal
CLK
CLK
CMD
CKE
Internal
CLK
DQ(CL2)
DQ(CL3)
RD
Q2
Q0
Q1
Q3
Q2
Q0
Q1
Q3
D0
D1
D2
D3
D1
D2
D3
D0
W R
Masked by CKE
1 ) Cl o ck 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 )
Not W ritten
Suspended Dout
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