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Chapter 24
Flash Memory
User’s Manual U16580EE3V1UD00
24.5.2 Features
(1)
Secure self-programming (boot swap function)
The V850E/PH2 supports a boot swap function that can exchange the physical memory of blocks
0 to 15 with the physical memory of blocks 16 to 31. By writing the start program to be rewritten to
blocks 16 to 31 in advance and then swapping the physical memory, the entire area can be safely
rewritten even if a power failure occurs during rewriting because a correct user program always
exists in blocks 0 to 15. Since a program flow into and out of the 2nd boot block cluster (physical
addresses: 10000H to 1FFFFH) is prohibited, the boot block swap has to be done twice. With this
second swap the logical address will be relocated to the physical address. For further information
refer to the application note “Self-Programming Library for embedded Single Voltage FLASH
(U16929EE)”.
Caution:
Program flow into and out of the 2nd boot block cluster (physical addresses 10000H
to 1FFFH) is prohibited. Thus, when boot swap function is used, the boot block clus-
ter has to be swapped twice.
The user application has to ensure that the second swap will be performed even if the
process was interrupted after the first swap. Therefore a dedicated mechanism has to
be provided by the user application to check the boot swap status, e.g. by a signa-
ture.
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
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