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參數資料
型號: S29AL032D90TFI043
廠商: SPANSION LLC
元件分類: PROM
英文描述: 32 Megabit CMOS 3.0 Volt-only Flash Memory
中文描述: 2M X 16 FLASH 3V PROM, 90 ns, PDSO48
封裝: LEAD FREE, MO-142DD, TSOP-48
文件頁數: 40/67頁
文件大小: 1708K
代理商: S29AL032D90TFI043
November 2, 2006 S29AL032D_00_A8
S29AL032D
43
Data
She e t
or erase operation. If it is still toggling, then the device had not complete the operation successfully, and the
system must write the reset command in order to return to reading array data.
The remaining scenario is that the system initially determines that the toggle bit is toggling and DQ5 has not
gone high. The system may continue to monitor the toggle bit and DQ5 through successive read cycles,
determining the status as described in the previous paragraph. Alternatively, it may choose to perform other
system tasks. In this case, the system must start at the beginning of the algorithm when it returns to
determine the status of the operation (top of Figure 12.2 on page 43).
Figure 12.2 Toggle Bit Algorithm
Notes
1. Read toggle bit twice to determine whether or not it is toggling. See text.
2. Recheck toggle bit because it may stop toggling as DQ5 changes to 1. See text.
START
No
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
(Notes 1, 2)
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