110
6.3.1
Programming and Verification
An efficient, high-speed, high-reliability programming procedure can be used to program and
verify data. This procedure programs the chip quickly without subjecting it to voltage stress and
without sacrificing data reliability. Data in unused address areas is H'FF. Figure 6.4 shows the
basic high-speed, high-reliability programming flow chart.
Start
Set program/verify mode
V = 6.0 V
±
0.25 V, V = 12.5 V
±
0.3 V
CC
PP
Address = 0
n = 0
n + 1 n
Program with t = 0.2 ms
±
5%
→
PW
Verification OK?
Overprogram with t = 0.2n ms
OPW
Last address?
Set read mode
V = 5.0 V
±
0.25 V, V = V
CC
PP
CC
All addresses
read?
End
Fail
n 25
<
A 1 address
→
No
Yes
No
Yes
Yes
No
No
Yes
Figure 6.4 High-Speed, High-Reliability Programming Flow Chart