AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 369

• Manufacturer Part Number: AT90USB1286-16MU
• Description: Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
• Manufacturer: ATMEL [ATMEL Corporation]

29.2
7593A–AVR–02/06
Fuse Bits
Table 29-2.
Notes:
The AT90USB64/128 has four Fuse bytes.
ality of all the fuses and how they are mapped into the Fuse bytes. Note that the fuses are read
as logical zero, “0”, if they are programmed.
Table 29-3.
Note:
BLB1 Mode
–
–
–
–
HWBE
BODLEVEL2
BODLEVEL1
BODLEVEL0
Fuse Low Byte
1
2
3
4
Memory Lock Bits
1. Program the Fuse bits and Boot Lock bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed
1. See
(1)
(1)
(1)
Lock Bit Protection Modes
Extended Fuse Byte
BLB12
Table 8-2 on page 61
1
1
0
0
7
6
5
4
3
2
1
0
Bit No
BLB11
1
0
0
1
Description
–
–
–
–
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
Hardware Boot Enable
Protection Type
No restrictions for SPM or (E)LPM accessing the Boot
Loader section.
SPM is not allowed to write to the Boot Loader section.
SPM is not allowed to write to the Boot Loader section,
and (E)LPM executing from the Application section is not
allowed to read from the Boot Loader section. If Interrupt
Vectors are placed in the Application section, interrupts
are disabled while executing from the Boot Loader
section.
(E)LPM executing from the Application section is not
allowed to read from the Boot Loader section. If Interrupt
Vectors are placed in the Application section, interrupts
are disabled while executing from the Boot Loader
section.
for BODLEVEL Fuse decoding.
(1)(2)
Table 29-3
(Continued)
-
Table 29-5
AT90USB64/128
Default Value
1
1
1
1
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
describe briefly the function-
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