AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 1193

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

39.2.2
39.2.2.1
9166C–AVR-08/11
SAB security restrictions
Security measure and control location
Table 39-1.
The Service Access bus can be restricted by internal security measures. A short description of
the security measures are found in the table below.
A security measure is a mechanism to either block or allow SAB access to a certain address or
address range. A security measure is enabled or disabled by one or several control signals. This
is called the control location for the security measure.
These security measures can be used to prevent an end user from reading out the code pro-
grammed in the flash, for instance.
Table 39-2.
Below follows a more in depth description of what locations are accessible when the security
measures are active.
Table 39-3.
Security Measure
Memory Service
Other accesses
OCD DCEMU,
OCD DCCPU,
programming
OCD DCSR
Security bit
User code
User page
Reserved
Name
Slave
HSB
Unit
SAB Slaves, addresses and descriptions.
SAB Security Measures
Security Bit SAB Restrictions
Control Location
UPROT + security
Address [35:32]
security bit set
Address start
0x100000110
0x580800000
FLASHC
FLASHC
bit set
Other
0x5
0x6
-
Description
Alternative mapping for HSB space, for compatibility with
other 32-bit AVR devices.
Memory Service Unit registers
Unused
Description
Programming and debugging not possible, very restricted
access.
Restricts all access except parts of the flash and the flash
controller for programming user code. Debugging is not
possible unless an OS running from the secure part of the
flash supports it.
Address end
0x100000118
0x581000000
-
Access
Read/Write
Read
Blocked
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