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START
)/$6+
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Read byte (DQ0–DQ7)
Address = VA
*
Read byte (DQ0–DQ7)
two times with OE toggling
Address = don’t care
DQ7 =
data?
NO
NO
Is time
elapsed = 1ms?
NO
YES DONE
Does
DQ6
toggle?
NO DONE
YES
NO
DQ5 = 1?
DQ5 = 1?
YES
YES
Read byte (DQ0–DQ7)
Address = VA
*
YES
Read byte (DQ0–DQ7)
two times with OE toggling
Address = don’t care
DQ7
†
=
data ?
NO
YES DONE
Does
DQ6
*
toggle ?
NO
DONE
Issue Reset/read
command
Addr = X
Data = F0h
DONE
YES
*
VA = Byte address for programming. VA = any of the sector addresses
within the sector being erased during sector erase. VA = valid address
equals any non-protected sector group address during chip erase.
†
DQ7 rechecked even if DQ5 = 1 because DQ5 and DQ7 may not change
simultaneously.
Issue Reset/read
command
Addr = X
Data = F0h
*
DONE
DQ6 rechecked even if DQ5 = 1 because DQ6 may stop toggling when
DQ5 changes to 1.
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ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
