HY29F800A Datasheet, PDF (18/40 Pages) Hynix Semiconductor – 8 Megabit (1Mx8/512Kx16), 5 Volt-only, Flash Memory

HY29F800A
START
Read DQ[7:0]
at Valid Address (Note 1)
Read DQ[7:0]
at Valid Address (Note 1)
DQ[5] = 1?
NO
YES
Read DQ[7:0]
at Valid Address (Note 1)
Read DQ[7:0]
Read DQ[7:0]
NO
(Note 4)
YES
DQ[6] Toggled?
NO
(Note 3)
PROGRAM/ERASE
COMPLETE
NO DQ[6] Toggled?
(Note 2)
YES
PROGRAM/ERASE
EXCEEDED TIME ERROR
NO
DQ[2] Toggled?
YES
SECTOR BEING READ
IS IN ERASE SUSPEND
SECTOR BEING READ
IS NOT IN ERASE SUSPEND
Notes:
1. During programming, the program address.
During sector erase, an address within any sector scheduled for erasure.
2. Recheck DQ[6] since toggling may stop at the same time as DQ[5] changes from 0 to 1.
3. Use this path if testing for Program/Erase status.
4. Use this path to test whether sector is in Erase Suspend mode.
Figure 8. Toggle Bit I and II Test Algorithm
all further sector erase data cycles or commands
(other than Erase Suspend) are ignored until the
erase operation is complete. If DQ[3] is a ‘0’, the
device will accept a sector erase data cycle to mark
an additional sector for erasure. To ensure that
the data cycles have been accepted, the system
software should check the status of DQ[3] prior to
and following each subsequent sector erase data
cycle. If DQ[3] is high on the second status check,
the last data cycle might not have been accepted.
18
Rev. 1.1/Feb 02