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参数资料
| 型号： | W948D2FBJX5E |
| 厂商： | Winbond Electronics |
| 文件页数： | 12/60页 |
| 文件大小： | 0K |
| 描述： | IC LPDDR SDRAM 256MBIT 90VFBGA |
| 标准包装： | 240 |
| 格式 - 存储器： | RAM |
| 存储器类型： | 移动 LPDDR SDRAM |
| 存储容量： | 256M（8Mx32） |
| 速度： | 200MHz |
| 接口： | 并联 |
| 电源电压： | 1.7 V ~ 1.95 V |
| 工作温度： | -25°C ~ 85°C |
| 封装/外壳： | 90-TFBGA |
| 供应商设备封装： | 90-VFBGA（8x13） |
| 包装： | 托盘 |
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W948D6FB / W948D2FB
256Mb 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 : Oct, 15, 2012
- 12 -
Revision : A01-004
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W948D2FBJX5ETR | 制造商:Winbond Electronics Corp 功能描述:256M MDDR, X32, 200MHZ |
| W948D2FBJX5I | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR SDRAM 256M-Bit 8Mx32 1.8V 90-Pin VFBGA 制造商:Winbond Electronics Corp 功能描述:IC MEMORY |
| W948D2FBJX5I TR | 制造商:Winbond Electronics Corp 功能描述:256M MDDR, X32, 200MHZ, INDUST |
| W948D2FBJX6E | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR SDRAM 256M-Bit 8Mx32 1.8V 90-Pin VFBGA 制造商:Winbond Electronics 功能描述:LOW POWER DRAM 制造商:Winbond Electronics Corp 功能描述:IC MEMORY |
| W948D2FBJX6ETR | 制造商:Winbond Electronics Corp 功能描述:256M MDDR, X32, 166MHZ, 65NM |
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