HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 627

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

High-Speed, High-Reliability Programming: Unused areas of the H8/3048F flash memory
contain H'FF data (initial value). The H8/3048F flash memory uses a high-speed, high-reliability
programming procedure. This procedure provides enhanced programming speed without
subjecting the device to voltage stress and without sacrificing the reliability of programmed data.
Figure 18-23 shows the basic high-speed, high-reliability programming flowchart. Tables 18-22
and 18-23 list the electrical characteristics during programming.
Address + 1
address
Figure 18-23 High-Speed, High-Reliability Programming
No
Program setup command
Program-verify command
Set V
Program command
Set V
Last address?
PP
Verification?
Address = 0
Wait (25 s)
Wait (6 s)
n + 1
= 12.0 V 0.6 V
n = 0
Start
End
PP
= V
OK
618
Yes
n
CC
No good
n = 20?
Fail
Yes
No