upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 340
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upd70f3422gj-gae-qs-ax
Manufacturer Part Number
upd70f3422gj-gae-qs-ax
Description
32-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3422GJ-GAE-QS-AX.pdf
(930 pages)
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Chapter 10
340
Table 10-1
Note
Possible results of ID code comparison
a)
b)
c)
1.
2.
For more details refer to “Security function“ on page 879.
Preliminary User’s Manual U17566EE1V2UM00
N-Wire use enable flag
0
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.
If an unauthorized user tries to find out the 10-byte ID by comparing all
possible ID codes, this will take up to 3.83 x 10
Codes are not compared
Once the N-Wire debug interface has been set as “use-prohibited”, it cannot be
used until the flash memory is re-programmed.
This is the default state after the flash memory has been erased.
ID code
X
user-specific
ID code
ID code is all
ones
a
c
Protection Level
Level 2: Full protection
N-Wire debug interface cannot be used.
Level 1: ID code protection
N-Wire debug interface can only be used
if the user enters the correct ID code.
Level 0: No protection
N-Wire debug interface can be used.
Code Protection and Security
8
years at 100 MHz.
b
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