Rainbow Electronics W27E040 - Manual (Page 10)

W27E040
- 10 -
SMART PROGRAMMING ALGORITHM
Start
Address = First Location
Vcc = 5V
Vpp = 12V
Increment X
X = 25?
Verify One Byte
Last
Address?
Vcc = 5V
Vpp = 5V
Compare All Bytes
to Original Data
Pass
Device
Increment
Address
No
Fail
Yes
Pass
Fail
Fail
Fail
Device
Verify One Byte
No
Pass
Yes
Pass
X = 0
Program One 100 S Pulse µ
*Program whole chip
without data verification and read
*: Program the whole chip again without data verification and read.