參數(shù)資料
型號: WED9LAPC2C16P8BI
廠商: WHITE ELECTRONIC DESIGNS CORP
元件分類: DRAM
英文描述: 4M X 32 SYNCHRONOUS DRAM, PBGA153
封裝: 14 X 22 MM, BGA-153
文件頁數(shù): 13/21頁
文件大?。?/td> 693K
代理商: WED9LAPC2C16P8BI
20
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WED9LAPC2B16P8BC
November 2001
Rev. 1
White Electronic Designs Corp. reserves the right to change products or specications without notice.
FIGURE 14 – SDRAM MODE REGISTER SET CYCLE
0
1
2
3
4
5
6
GCK
VCRAS#
VCCAS#
VCADDR
VCDATA
VCWE#
VCDQM#
MRS
New
Command
DON’T CARE
Note 2
HI-Z
Note 1
Note 3
Key
Ra
*Both banks precharge should be completed before Mode Register Set cycle.
NOTES:
MODE REGISTER SET CYCLE
1. VCRAS#, VCCAS# & VCWE# activation at the same clock cycle with address key will set internal mode register.
2. Minimum 2 clock cycles should be met before new VCRAS# activation.
3. Please refer to Mode Register Set table.
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