Smart erase algorithm – Rainbow Electronics W27E040 User Manual
Page 11
W27E040
Publication Release Date: May 1997
- 11 -
Revision A1
SMART ERASE ALGORITHM
Start
Vcc = 5V
Vpp = 14V
Increment X
Last
Address?
Vcc = 5V
Vpp = 5V
Compare
All Bytes to
FFs (HEX)
Pass
Device
Increment
Address
No
Fail
Fail
Fail
Device
X = 0
A9 = 14V; A0 = V
Chip Erase 100 mS Pulse
Address = First Location
Erase
Verify
X = 20?
No
Yes
Pass
Pass
Yes
IL
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