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AM29BDS640G bảng dữ liệu(PDF) 43 Page - Advanced Micro Devices

tên linh kiện AM29BDS640G
Giải thích chi tiết về linh kiện  64 Megabit (4 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
PDF  77 Pages
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nhà sản xuất  AMD [Advanced Micro Devices]
Trang chủ  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM29BDS640G bảng dữ liệu(HTML) 43 Page - Advanced Micro Devices

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May 9, 2006 25903C2
Am29BDS640G
41
Data
Sheet
Note: The system should recheck the toggle bit even if DQ5 = “1” because the toggle
bit may stop toggling as DQ5 changes to “1.” See the subsections on DQ6 and DQ2
for more information.
Figure 5. Toggle Bit Algorithm
DQ2: Toggle Bit II
The “Toggle Bit II” on DQ2, when used with DQ6, indicates whether a particular
sector is actively erasing (that is, the Embedded Erase algorithm is in progress),
or whether that sector is erase-suspended. Toggle Bit II is valid after the rising
edge of the final WE# pulse in the command sequence.
DQ2 toggles when the system reads at addresses within those sectors that have
been selected for erasure. But DQ2 cannot distinguish whether the sector is ac-
tively erasing or is erase-suspended. DQ6, by comparison, indicates whether the
device is actively erasing, or is in Erase Suspend, but cannot distinguish which
START
No
Yes
Yes
DQ5 = 1?
No
Yes
Toggle Bit
= Toggle?
No
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
Read DQ7–DQ0
Toggle Bit
= Toggle?
Read DQ7–DQ0
Twice
Read DQ7–DQ0



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