收藏本站
W949D6CB / W949D2CB
512Mb Mobile LPDDR
6.1.2 Initialization Waveform Sequence
VDD
VDDQ
200us
t CK
t RP
t RFC
t RFC
t MRD
t MRD
CK
CK
CKE
Command
NOP
PRE
ARF
ARF
MRS
MRS
ACT
Address
CODE
CODE
RA
A10
All
Banks
CODE
CODE
RA
BA0,BA1
DM
BA0=L
BA1=L
BA0=L
BA1=H
BA
DQ,DQS
(High-Z)
VDD/VDDQ powered up
Clock stable
Load
Mode Reg.
Load
Ext.Mode Reg..
= Don't Care
6.2 Register Definition
6.2.1 Mode Register Set Operation
The Mode Register is used to define the specific mode of operation of the LPDDR SDRAM. This definition includes
the definition of a burst length, a burst type, a CAS latency as shown in the following figure.
The Mode Register is programmed via the MODE REGISTER SET command (with BA0=0 and BA1=0) and will
retain the stored information until it is reprogrammed, the device goes into Deep Power Down mode, or the device
loses power.
Mode Register bits A0-A2 specify the burst length, A3 the type of burst (sequential or interleave), A4-A6 the CAS
latency. A logic 0 should be programmed to all the undefined addresses bits to ensure future compatibility.
The Mode Register must be loaded when all banks are idle and no bursts are in progress, and the controller must
wait the specified time tMRD before initiating any subsequent operation. Violating either of these requirements will
result in unspecified operation.
Reserved states should not be used, as unknown operation or incompatibility with future versions may result.
Publication Release Date: Sep, 21, 2011
- 12 -
Revision A01-007
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
W971GG6JB25I IC DDR2 SDRAM 1GBIT 84WBGA
W971GG8JB-25 IC DDR2 SDRAM 1GBIT 60WBGA
W9725G6IB-25 IC DDR2-800 SDRAM 256MB 84-WBGA
W9725G6JB25I IC DDR2 SDRAM 256MBIT 84WBGA
W9725G6KB-25I IC DDR2 SDRAM 256MBIT 84WBGA
W972GG6JB-3I IC DDR2 SDRAM 2GBITS 84WBGA
W9751G6IB-25 IC DDR2-800 SDRAM 512MB 84-WBGA
W9751G6KB-25 IC DDR2 SDRAM 512MBIT 84WBGA
相关代理商/技术参数
W949D2CBJX5ETR 制造商:Winbond Electronics Corp 功能描述:512M MDDR, X32, 200MHZ
W949D2CBJX5I 制造商:Winbond Electronics Corp 功能描述:DRAM Chip Mobile LPDDR SDRAM 512M-Bit 16Mx32 1.8V 90-Pin VFBGA
W949D2CBJX5I TR 制造商:Winbond Electronics Corp 功能描述:512M MDDR, X32, 200MHZ, INDUST
W949D2CBJX6E 制造商:Winbond Electronics Corp 功能描述:DRAM Chip Mobile LPDDR SDRAM 512M-Bit 16Mx32 1.8V 90-Pin VFBGA
W949D2CBJX6ETR 制造商:Winbond Electronics Corp 功能描述:512M MDDR, X32, 166MHZ, 65NM
W949D2CBJX6G 制造商:WINBOND 制造商全称:Winbond 功能描述:512Mb Mobile LPDDR
W949D2KBJX5E 制造商:Winbond Electronics Corp 功能描述:512M MDDR, X32, 200MHZ 制造商:Winbond Electronics Corp 功能描述:IC MEMORY
W949D2KBJX5I 制造商:Winbond Electronics Corp 功能描述:IC MEMORY