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參數資料
| 型號： | W972GG8JB-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | DRAM |
| 英文描述： | 256M X 8 DDR DRAM, 0.4 ns, PBGA60 |
| 封裝： | 11 X 11.50 MM, ROHS COMPLIANT, WBGA-60 |
| 文件頁數： | 5/86頁 |
| 文件大小： | 1466K |
| 代理商： | W972GG8JB-25 |
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W972GG8JB
Publication Release Date: Feb. 18, 2011
- 13 -
Revision A02
7.2.2.3
Extend Mode Register Set Command (2), EMR (2)
( CS = "L", RAS = "L", CAS = "L",
WE = "L", BA0 = "L", BA1 = "H", BA2 = "L" A0 to A14 =
Register data)
The extended mode register (2) controls refresh related features. The default value of the extended
mode register (2) is not defined, therefore the extended mode register (2) must be programmed during
initialization for proper operation.
The DDR2 SDRAM should be in all bank precharge state with CKE already high prior to writing into
the extended mode register (2). The mode register set command cycle time (tMRD) must be satisfied to
complete the write operation to the extended mode register (2). Mode register contents can be
changed using the same command and clock cycle requirements during normal operation as long as
all banks are in the precharge state.
BA2
BA1
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
SELF
0*
1
Address Field
Extended Mode Register (2)
0*
1
A7
1
0
Disable
High Temperature Self Refresh Rate Enable
Enable*
2
BA0
A13
0*
1
BA1 BA0
MRS mode
0
1
MRS
EMR (1)
EMR (2)
EMR (3)
A14
Notes:
1. The rest bits in EMR (2) is reserved for future use and all bits in EMR (2) except A7, BA0, BA1 and BA2 must be
programmed to 0 when setting the extended mode register (2) during initialization.
2. When DRAM is operated at 85°C < TCASE
≤ 95°C the extended Self Refresh rate must be enabled by setting bit A7 to "1"
before the Self Refresh mode can be entered.
Figure 4
– EMR (2)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W972GG8JB-25I | 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 80WBGA |
| W972GG8JB-3 | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR2 SDRAM 2G-Bit 256Mx8 1.8V 60-Pin WBGA 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 3NS |
| W9751G6IB-25 | 功能描述:IC DDR2-800 SDRAM 512MB 84-WBGA RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應商設備封裝:8-MFP 包裝:帶卷 (TR) |
| W9751G6JB | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8M ? 4 BANKS ? 16 BIT DDR2 SDRAM |
| W9751G6JB-25 | 制造商:Winbond Electronics Corp 功能描述:512GB DDRII |
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