HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 436

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

t
OPW
V
V
t
PW
CC
PP
Figure 16.4 Basic Flowchart of High-Speed High-Reliability Programming
No good
: Power supply
: PROM program power supply
: Initial programming pulse width
: Over programming pulse width
Yes
n = 25?
No
No
No
(V
(V
V
Set EPROM writer to
(t
(t
writer to read mode
reading all address
PP
OPW
CC
CC
write/verify mode
PW
= 12.5 V
Set EPROM
Address = 0
= 6.0 V
= 5.0 V
V
result OK?
= 0.2 ms
Data write
Data write
Results of
n + 1
address?
= (0.2
PP
Verify
Start
n = 0
Final
OK?
End
= V
Yes
Yes
Yes
CC
n
0.25 V,
0.25 V,
n) ms)
0.3 V)
)
5%)
No
Address + 1
Address
HITACHI 425