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32059L–AVR32–01/2012
AT32UC3B
14.9.2
Default Fuse Value
The devices are shipped with the FGPFRLO register value: 0xFC07FFFF:
GPF31 fuse set to 1b. This fuse is used by the pre-programmed USB bootloader.
GPF30 fuse set to 1b. This fuse is used by the pre-programmed USB bootloader.
GPF29 fuse set to 1b. This fuse is used by the pre-programmed USB bootloader.
BODEN fuses set to 11b. BOD is disabled.
BODHYST fuse set to 1b. The BOD hysteresis is enabled.
BODLEVEL fuses set to 000000b. This is the minimum voltage trigger level. BOD will never
trigger as this level is below the POR level.
BOOTPROT fuses set to 011b. The bootloader protected size is 8 Ko.
EPFL fuse set to 1b. External privileged fetch is not locked.
LOCK fuses set to 1111111111111111b. No region locked.
See also the AT32UC3B Bootloader user guide document.
After the JTAG chip erase command, the FGPFRLO register value is 0xFFFFFFFF.
14.10 Bootloader Configuration
The bootloader uses one word in the flash User page to store its configuration. This configura-
tion word is located at address 0x808001FC and its default value is 0x929E0D6B.
Refer to the bootloader documentation for more information.
14.11 Serial Number
Each device has a unique 120 bits serial number readable from address 0x80800204 to
0x80800212.
14.12 Module configuration
Table 14-8.
Flash Memory Parameters
Part Number
Flash Size
(FLASH_PW)
Number of pages
(FLASH_P)
Page size
(FLASH_W)
General Purpose
Fuse bits
(FLASH_L)
AT32UC3B0512
512 Kbytes
1024
128 words
32 fuses
AT32UC3B1512
512 Kbytes
1024
128 words
32 fuses
AT32UC3B0256
256 Kbytes
512
128 words
32 fuses
AT32UC3B1256
256 Kbytes
512
128 words
32 fuses
AT32UC3B0128
128 Kbytes
256
128 words
32 fuses
AT32UC3B1128
128 Kbytes
256
128 words
32 fuses
AT32UC3B064
64 Kbytes
128
128 words
32 fuses
AT32UC3B164
64 Kbytes
128
128 words
32 fuses