Datasheet

676
Start
Set EPROM writer to
write/verify mode
(V
CC
= 6.0 V ± 0.25 V,
V
PP
= 12.5 V ± 0.3 V)
Address = 0
n = 0
n + 1 → n
Data write
(t
PW
= 0.2 ms ± 5%)
Data write
(t
OPW
= 0.2n ms)
Is verify
result OK?
No
Yes
Final
address?
No
Yes
Set EPROM
writer to read mode
(V
CC
= 5.0 V ± 0.25 V,
V
PP
= V
CC
)
All address
read results
OK?
No
Yes
End
No good
No
V
CC
: Power supply
V
PP
: PROM program power supply
t
PW
: Initial programming pulse width
t
OPW
: Over-programming pulse width
n = 25?
Yes
Address + 1 → 
address
< Preliminary >
Figure 21.6 High-Speed, High-Reliability Programming Basic Flow