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Chapter 8
Table 8-1
Note
290
You can specify your own 10-byte ID code and program it to the internal flash
memory by an external flash writer or with the self-programming feature. The
ID code is located in the address range 0000 0070
The protection levels are summarized in Table 8-1
Possible results of ID code comparison
N-Wire use enable flag
0
1
a)
Codes are not compared
b)
Once the N-Wire debug interface has been set as "use-prohibited", it cannot be
used until the flash memory is re-programmed.
c)
This is the default state after the flash memory has been erased.
1.
After you have set protection levels 1 or 2, set the "block erase disable flag"
in the flash extra area. Otherwise, an unauthorized person could erase the
block that contains the ID code or the "N-Wire use enable flag",
respectively, and thus suspend the protection.
User's Manual U18743EE1V2UM00
ID code
Protection Level
a
X
Level 2:
Full protection
N-Wire debug interface cannot be used.
user-specific
Level 1:
ID code
ID code protection user ID code
N-Wire debug interface can only be used
if the user enters the correct ID code.
ID code is all
Level 0:
c
ones
ID code protection with default ID code
N-Wire debug interface can be used if the
user enters the default ID code FF
ID bytes.
Data Protection and Security
to 0000 0079
.
H
H
b
for all
H
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