Rainbow Electronics W27E520 - Manual (Page 12)

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