参数资料
型号: W948D2FBJX5E
厂商: Winbond Electronics
文件页数: 11/60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
W948D6FB / W948D2FB
256Mb Mobile LPDDR
6.1.1 Initialization Flow Diagram
1
2
3
4
VDD and VDDQ Ramp: CKE must be held high
Apply stable clocks
Wait at least 200us with NOP or DESELECT on command bus
PRECHARGE ALL
5
Assert NOP or DESELCT for
t RP time
6
7
Issue two AUTO REFRESH commands each followed by
NOP or DESELECT commands for t RFC time
Configure Mode Register
8
Assert NOP or DESELECT for
t MRD time
9
Configure Extended Mode Register
10
Assert NOP or DESELECT for
t MRD time
11
LPDDR SDRAM is ready for any valid command
Publication Release Date : Oct, 15, 2012
- 11 -
Revision : A01-004
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