HY29F040A Datasheet, PDF (30/40 Pages) Hynix Semiconductor – 512K x 8-bit CMOS 5.0 volt-only, Sector Erase Flash Memory

Im p lem en t P LS C N T
No
PLSCNT = 25
?
Yes
D e vic e F ailed
START
Set U p S ector Ad dress
(A18, A17, A16)
PLSCNT = 1
A9 = V _ID
/O E = V _ID
/C E = V _IL
A ctivate /W E P uls e
Tim e Ou t 10 0 µs
Power Down /OE
/W E = V _IH
/C E = /O E = V _IL
A9 R em ains at V _ID
Address = SA
A0 = V _IL, A 1 = V_IH, A 6 = V_IL
Re ad from Sec tor
No
D ata = 01H
?
Yes
Prote ct
Yes
Another Sector?
No
Power Do wn A9
S ec tor P ro te c t C om ple te
Figure 13. Sector Protection Algorithm
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HY29F040A