582
Chapter 20
Flash Memory (µPD70F3123)
Preliminary User’s Manual U14913EE1V0UM00
Figure 20-10: Secure Selfprogramming Flow (1/2)
Vector Table
Vector Table
Vector Table
Signature
Signature
Bootblock Size
Bootblock Size
Bootblock Size
Bootprogram
Bootprogram
Bootprogram
Application Part 1
Application Part 1
Application Part 1
Application Part 2
Erased
Vector Table
Signature
Bootblock Size
Bootprogram
00000000H
00020000H
0003FFFFH
Area 0
Area 0
Area 0
Area 1
Area 1
Area 1
Upper
Area
Lower
Area
Erase upper
Area
Copy bootloader to upper area
set signature in upper area
kill signature in lower area
Kill
Set
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