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參數(shù)資料
| 型號： | S29AL004D90SFI013 |
| 廠商： | SPANSION LLC |
| 元件分類： | PROM |
| 英文描述： | 256K X 16 FLASH 3V PROM, 90 ns, PDSO48 |
| 封裝： | LEAD FREE, MO-180AA, SO-44 |
| 文件頁數(shù)： | 22/53頁 |
| 文件大?。?/td> | 1402K |
| 代理商： | S29AL004D90SFI013 |
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November 12, 2004 S29AL004D_00_A0
S29AL004D
29
Pre l i m i n a r y
After the sector erase command sequence is written, the system should read the
status on DQ7 (Data# Polling) or DQ6 (Toggle Bit I) to ensure the device has ac-
cepted the command sequence, and then read DQ3. If DQ3 is “1”, the internally
controlled erase cycle has begun; all further commands (other than Erase Sus-
pend) are ignored until the erase operation is complete. If DQ3 is “0”, the device
will accept additional sector erase commands. To ensure the command has been
accepted, the system software should check the status of DQ3 prior to and fol-
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. 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.
Figure 6. Toggle Bit Algorithm
(Notes
1, 2)
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| S29AL004D90TAI013 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90TAI020 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90TAI022 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
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