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參數(shù)資料
| 型號： | W946432AD-6 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | DRAM |
| 英文描述： | 2M X 32 DDR DRAM, 0.1 ns, PQFP100 |
| 文件頁數(shù)： | 2/39頁 |
| 文件大?。?/td> | 577K |
| 代理商： | W946432AD-6 |
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W946432AD
10
REGISTER DEFINITION
MODE REGISTER
The Mode Register is programmed by the MODE REGISTER SET command (MRS/EMRS) when all banks
are idle and no bursts are in progress
.
The Mode Register is used to define the operation specific mode of of the DDR SDRAM. This definition
includes the selection of a burst length, a burst type, a CAS latency, and an operating mode, as shown in
Figure1:
The Extended Mode Register controls functions beyond those controlled by the Mode Register; these
additional functionsinclude DLL enable/disable,output drive strength selection. These functions as shown
inFigure1:.
Mode Register must be loaded, and the controller must wait the specified time before initiating the
subsequent operation. Violating either of these requirements will result in unspecified operation.
Figure1:Mode Register Definition
BA0 BA1 A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
12
10
9
8
7
6
5
4
3
2
1
0
0*
Extended Mode Register
Address Bus
BT
Operating Mode
0*
13
CAS Latency
Burst Latency
* BA0 and BA1
must be 0, 0 to select the
Mode Register (vs. the
Extended Mode Register).
A3
Burst Type
0
1
Burst Latency
Sequential
Interleaved
CAS Latency
Reserved
3
Reserved
A3 = 0
A3 = 1
Reserved
22
44
88
Reserved
A2 A1 A0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Operating Mode
Normal Operation
Normal Operation/Reset DLL
Vendor Specific Test Mode
All other states reserved
A6 A5 A4
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
A6-A0
Valid
VS
Valid
-
A7
A8
0
1
0
--
An-A9
0
-
VS = Vendor Specific
MODE REGISTER DEFINITION
Reserved
Enable
Disable
DS0
Normal
Weak (optional)
BA0 BA1 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
12 11 10 9
8
7
6
5 4
3
2
1 0
1* 0*
DS0 DLL
A0
0
1
DLL
A1
0
1
* BA0 and BA1
must be 1, 0 to select the
Extended Mode Register (vs. the
base Mode Register).
Extended Mode Register
Address Bus
EXTENDED MODE REGISTER DEFINITION
Operating Mode
-
Valid
-
Operating Mode
Normal Operation
All other states
reserved
A10-
A2
A1-
A0
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W9464G6IB | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M × 4 BANKS × 16 BITS DDR SDRAM |
| W9464G6IH | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M ?? 4 BANKS ?? 16 BITS DDR SDRAM |
| W9464G6JH | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M ? 4 BANKS ? 16 BITS DDR SDRAM |
| W9464G6JH-4 | 制造商:Winbond Electronics Corp 功能描述:IC DDR SDRAM 64M 200MHZ 66TSOP |
| W9464G6JH-5 | 制造商:Winbond Electronics Corp 功能描述:64MBIT DDRI 制造商:Winbond Electronics Corp 功能描述:IC DDR SDRAM 64M 200MHZ 66TSOP |
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