參數(shù)資料
型號: S71AL016M40
廠商: Spansion Inc.
英文描述: Stacked Multi-Chip Product (MCP) Flash Memory and RAM
中文描述: 堆疊式多芯片產(chǎn)品(MCP)的閃存和RAM
文件頁數(shù): 42/68頁
文件大小: 728K
代理商: S71AL016M40
42
S71AL016M
S71AL016M_M0 A0 February 23, 2005
A d v a n c e I n f o r m a t i o n
Figure 8. 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.
DQ5: Exceeded Timing Limits
DQ5 indicates whether the program or erase time exceeded a specified internal
pulse count limit. Under these conditions DQ5 produces a
1
. This is a failure con-
dition that indicates the program or erase cycle was not successfully completed.
The DQ5 failure condition may appear if the system tries to program a
1
to a lo-
cation that is previously programmed to
0
.
Only an erase operation can
change a
0
back to a
1
.
Under this condition, the device halts the operation,
and when the operation exceeds the timing limits, DQ5 produces a
1
.
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
(Note 1)
(Notes
1, 2)
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