k4s161622e Samsung Semiconductor, Inc., k4s161622e Datasheet - Page 14

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k4s161622e

Manufacturer Part Number
k4s161622e
Description
1m X 16 Sdram
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.K4S161622E.pdf (42 pages)

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K4S161622E
BASIC FEATURE AND FUNCTION DESCRIPTIONS
1. CLOCK Suspend
2. DQM Operation
*Note : 1. CKE to CLK disable/enable = 1CLK.
DQ(CL2)
DQ(CL3)
DQ(CL2)
DQ(CL3)
DQ(CL2)
DQ(CL3)
3) DQM with Clock Suspended (Full Page Read)
Internal
CMD
CMD
DQM
DQM
CKE
CMD
CKE
CKE
2. DQM makes data out Hi-Z after 2CLKs which should masked by CKE " L"
3. DQM masks both data-in and data-out.
CLK
CLK
CLK
1) Clock Suspended During Write (BL=4)
1) Write Mask (BL=4)
RD
WR
WR
D
D
D
D
0
0
0
0
D
D
D
D
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1
1
1
1
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DQM to Data-in Mask = 0
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Q
Not Written
0
Masked by CKE
Masked by DQM
D
D
D
D
2
2
3
3
Hi-Z
Hi-Z
D
D
Note 2
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3
3
Q
Q
2
1
2) Clock Suspended During Read (BL=4)
Hi-Z
Hi-Z
2) Read Mask (BL=4)
RD
RD
Q
Q
4
3
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
Hi-Z
Hi-Z
Q
Q
0
0
Hi-Z
Hi-Z
D
Q
Q
0
Q
Q
1
0
Masked by DQM
6
5
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x
Q
Q
Suspended Dout
Q
Q
Masked by CKE
2
1
DQM to Data-out Mask = 2
Q
Q
7
6
2
1
Q
Q
CMOS SDRAM
Q
Q
3
2
8
7
Rev 1.1 Jan '03
Q
Q
Q
3
2
3
Q
3

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