W27E520 Datasheet, PDF (12/16 Pages) Winbond – 64K X 8 ELECTRICALLY ERASABLE EPROM

SMART ERASE ALGORITHM 1
Start
X=0
VDD= 6.5V
OE/Vpp = 13V
A9 = 13V; A8&A11 = V IL
A10 = V IH
Chip Erase 100 mS Pulse
Address = First Location
Increment X
VDD = 6.5V
OE/Vpp = VIL
Increment No
Address
Erase
Fail
Verify
Pass
Last
Address?
Yes
Power
Down
VDD = 5.0V
OE/Vpp = VIL
Compare
All Bytes to
Fail
FFs (HEX)
Pass
Pass
Device
- 12 -
W27E520
No
X = 20?
Yes
Fail
Device