參數(shù)資料
型號: S29AL004D90BAI010
廠商: SPANSION LLC
元件分類: DRAM
英文描述: 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory
中文描述: 256K X 16 FLASH 3V PROM, 90 ns, PBGA48
封裝: 8.15 X 6.15 MM, FBGA-48
文件頁數(shù): 32/55頁
文件大?。?/td> 1481K
代理商: S29AL004D90BAI010
30
S29AL004D
S29AL004D_00_A1 February 18, 2005
A d v a n c e I n f o r m a t i o n
sector erase commands is always less than 50 μs. See also the
Sector Erase
Command Sequence on page 22
.
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
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
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)
(Note 1)
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