AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 262

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

9166C–AVR-08/11
The BOOTPROT fuses protects the following address space for the Boot Loader:
Table 15-3.
The SECURE fuses have the following functionality:
Table 15-4.
To erase or write a general-purpose fuse bit, the commands Write General-Purpose Fuse Bit
(WGPB) and Erase General-Purpose Fuse Bit (EGPB) are provided. Writing one of these com-
mands, together with the number of the fuse to write/erase, performs the desired operation.
An entire general-purpose fuse byte can be written at a time by using the Program GP Fuse
Byte (PGPFB) instruction. A PGPFB to GP fuse byte 2 is not allowed if the flash is locked by the
security bit. The PFB command is issued with a parameter in the PAGEN field:
All general-purpose fuses can be erased by the Erase All General-Purpose fuses (EAGP) com-
mand. An EAGP command is not allowed if the flash is locked by the security bit.
Two errors can be detected in the FSR register after issuing these commands:
BOOTPROT
7
6
5
4
3
2
1
0
SECURE
00
01
10
11
• PAGEN[2:0] - byte to write
• PAGEN[10:3] - Fuse value to write
• Programming Error: A bad keyword and/or an invalid command have been written in the
• Lock Error:
FCMD register.
– A write or erase of the BOOTPROT or EPFL or UPROT fuse bits was attempted
– A write or erase of the SECURE fuse bits was attempted when SECURE mode was
while the flash is locked by the security bit.
enabled.
Boot Loader Area Specified by BOOTPROT
Secure state configuration
Pages protected by
BOOTPROT
None
0-1
0-3
0-7
0-15
0-31
0-63
0-127
Functionality
Secure state disabled
Secure enabled, secure state debug enabled
Secure enabled, secure state debug disabled
Secure state disabled
Size of protected
memory
0
1kByte
2kByte
4kByte
8kByte
16kByte
32kByte
64kByte
AT32UC3C
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