A29002/A290021 Series
After the sector erase command sequence is written, the
system should read the status on I/O7 ( Polling) or
Data
START
I/O6 (Toggle Bit 1) to ensure the device has accepted the
command sequence, and then read I/O3. If I/O3 is "1", the
internally controlled erase cycle has begun; all further
commands (other than Erase Suspend) are ignored until
the 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 6 shows the outputs for I/O3.
Read I/O7-I/O0
Read I/O7-I/O0
(Note 1)
No
Toggle Bit
= Toggle ?
Yes
No
I/O5 = 1?
Yes
Read I/O7 - I/O0
(Notes 1,2)
Twice
No
Toggle Bit
= Toggle ?
Yes
Program/Erase
Operation Not
Commplete, Write
Reset Command
Program/Erase
Operation Complete
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 5. Toggle Bit Algorithm
(December, 2010, Version 1.6)
14
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
