A29L040A_15 Datasheet, PDF (14/29 Pages) AMIC Technology – Uniform Sector Flash Memory

erase operation is complete. If I/O3 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 I/O3 prior to and following each
subsequent sector erase command. If I/O3 is high on the
second status check, the last command might not have been
accepted. Table 5 shows the outputs for I/O3.
A29L040A Series
START
Read I/O7-I/O0
Read I/O7-I/O0 _{(Note 1)}
Toggle Bit
No
= Toggle ?
Yes
No
I/O5 = 1?
Yes
Read I/O7 - I/O0
Twice
(Notes 1,2)
Toggle Bit
No
= Toggle ?
Yes
Program/Erase
Operation Not
Commplete, Write
Reset Command
Program/Erase
Operation
Commplete
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 I/O5
changes to "1". See text.
Figure 4. Toggle Bit Algorithm
(July, 2014, Version 1.1)
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AMIC Technology, Corp.