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| 型号： | W9725G6JB25I |
| 厂商： | Winbond Electronics |
| 文件页数： | 1/87页 |
| 文件大小： | 0K |
| 描述： | IC DDR2 SDRAM 256MBIT 84WBGA |
| 标准包装： | 200 |
| 格式 - 存储器： | RAM |
| 存储器类型： | DDR2 SDRAM |
| 存储容量： | 256M（16Mx16） |
| 速度： | 2.5ns |
| 接口： | 并联 |
| 电源电压： | 1.7 V ~ 1.9 V |
| 工作温度： | -40°C ~ 95°C |
| 封装/外壳： | 84-TFBGA |
| 供应商设备封装： | 84-WBGA（8x12.5） |
| 包装： | 托盘 |
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W9725G6JB
4M ? 4 BANKS ? 16 BIT DDR2 SDRAM
Table of Contents-
1.
2.
3.
4.
5.
6.
7.
7.1
7.2
GENERAL DESCRIPTION ................................................................................................................... 4
FEATURES ........................................................................................................................................... 4
KEY PARAMETERS ............................................................................................................................. 5
BALL CONFIGURATION ...................................................................................................................... 6
BALL DESCRIPTION ............................................................................................................................ 7
BLOCK DIAGRAM ................................................................................................................................ 8
FUNCTIONAL DESCRIPTION .............................................................................................................. 9
Power-up and Initialization Sequence ................................................................................................... 9
Mode Register and Extended Mode Registers Operation ................................................................... 10
7.2.1
7.2.2
7.2.2.1
7.2.2.2
7.2.2.3
7.2.2.4
7.2.3
7.2.3.1
7.2.3.2
7.2.3.3
7.2.4
7.2.5
7.2.5.1
Mode Register Set Command (MRS)............................................................................... 10
Extend Mode Register Set Commands (EMRS) .............................................................. 11
Extend Mode Register Set Command (1), EMR (1)................................................ 11
DLL Enable/Disable ................................................................................................ 12
Extend Mode Register Set Command (2), EMR (2) ................................................ 13
Extend Mode Register Set Command (3), EMR (3) ................................................ 14
Off-Chip Driver (OCD) Impedance Adjustment ................................................................ 15
Extended Mode Register for OCD Impedance Adjustment .................................... 16
OCD Impedance Adjust .......................................................................................... 16
Drive Mode ............................................................................................................. 17
On-Die Termination (ODT) ............................................................................................... 18
ODT related timings ......................................................................................................... 18
MRS command to ODT update delay ..................................................................... 18
7.3
Command Function ............................................................................................................................. 20
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
7.3.8
7.3.9
7.3.10
7.3.11
Bank Activate Command.................................................................................................. 20
Read Command ............................................................................................................... 20
Write Command ............................................................................................................... 21
Burst Read with Auto-precharge Command..................................................................... 21
Burst Write with Auto-precharge Command ..................................................................... 21
Precharge All Command .................................................................................................. 21
Self Refresh Entry Command .......................................................................................... 21
Self Refresh Exit Command ............................................................................................. 22
Refresh Command ........................................................................................................... 22
No-Operation Command .................................................................................................. 23
Device Deselect Command .............................................................................................. 23
7.4
Read and Write access modes ........................................................................................................... 23
7.4.1
7.4.1.1
Posted CAS .................................................................................................................... 23
Examples of posted CAS operation ..................................................................... 23
Publication Release Date: Nov. 29, 2011
-1-
Revision A02
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W9725G6KB-18 | 制造商:Winbond Electronics 功能描述:IC MEMORY 制造商:Winbond Electronics Corp 功能描述:IC MEMORY |
| W9725G6KB-25 | 功能描述:IC DDR2 SDRAM 256MBIT 84WBGA RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:1 系列:- 格式 - 存储器:闪存 存储器类型:闪存 - NAND 存储容量:4G（256M x 16） 速度:- 接口:并联 电源电压:2.7 V ~ 3.6 V 工作温度:0°C ~ 70°C 封装/外壳:48-TFSOP（0.724"，18.40mm 宽） 供应商设备封装:48-TSOP I 包装:Digi-Reel® 其它名称:557-1461-6 |
| W9725G6KB-25 TR | 制造商:Winbond Electronics Corp 功能描述:256M DDR2-800, X16 |
| W9725G6KB25A | 制造商:WINBOND 制造商全称:Winbond 功能描述:DLL aligns DQ and DQS transitions with clock, Data masks (DM) for write data, Write Data Mask |
| W9725G6KB25I | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR2 SDRAM 256M-Bit 16Mx16 1.8V 84-Pin WBGA 制造商:Winbond Electronics 功能描述:IC DDR2 SDRAM 256M 2.5NS 84WBGA 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 256M 2.5NS 84WBGA 制造商:Winbond 功能描述:DRAM Chip DDR2 SDRAM 256M-Bit 16Mx16 1.8V 84-Pin WBGA |
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