s29al016m Meet Spansion Inc., s29al016m Datasheet - Page 40
s29al016m
Manufacturer Part Number
s29al016m
Description
16 Megabits 2m X 8-bits / 1m X 16-bits
Manufacturer
Meet Spansion Inc.
Datasheet
1.S29AL016M.pdf
(62 pages)
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38
DQ5: Exceeded Timing Limits
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 indicates whether the program or erase time has exceeded a specified inter-
nal pulse count limit. Under these conditions DQ5 produces a “1.” This is a failure
condition 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
location that is previously programmed to “0.” Only an erase operation can
No
Figure 8. Toggle Bit Algorithm
Complete, Write
Reset Command
Read DQ7–DQ0
Read DQ7–DQ0
Read DQ7–DQ0
Program/Erase
Operation Not
Toggle Bit
Toggle Bit
DQ5 = 1?
= Toggle?
= Toggle?
START
Twice
S29AL016M
Yes
Yes
Yes
D a t a
(Note 1)
(Notes
1, 2)
Operation Complete
No
No
S h e e t
Program/Erase
S29AL016M_00_A7 October 11, 2006