參數(shù)資料
型號: MT46V32M8FG-6TIT:G
元件分類: DRAM
英文描述: 32M X 8 DDR DRAM, 0.7 ns, PBGA60
封裝: (8 X 14) MM, PLASTIC, FBGA-60
文件頁數(shù): 51/93頁
文件大小: 3632K
PDF: 09005aef80768abb/Source: 09005aef82a95a3a
Micron Technology, Inc., reserves the right to change products or specifications without notice.
DDR_x4x8x16_Core2.fm - 256Mb DDR: Rev. O, Core DDR: Rev. B 1/09 EN
53
2003 Micron Technology, Inc. All rights reserved.
256Mb: x4, x8, x16 DDR SDRAM
Operations
Figure 21:
INITIALIZATION Flow Diagram
VDD and VDDQ ramp
Apply VREF and VTT
CKE must be LVCMOS LOW
Apply stable CLOCKs
Bring CKE HIGH with a NOP command
Wait at least 200s
PRECHARGE ALL
Assert NOP or DESELECT for tRP time
Configure extended mode register
Configure load mode register and reset DLL
Assert NOP or DESELECT for tMRD time
PRECHARGE ALL
Issue AUTO REFRESH command
Assert NOP or DESELECT for tRFC time
Optional LMR command to clear DLL bit
Assert NOP or DESELECT for tMRD time
DRAM is ready for any valid command
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Assert NOP or DESELECT commands for tRFC
Issue AUTO REFRESH command
Assert NOP or DESELECT for tRP time
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