AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 324

• Manufacturer Part Number: AT90CAN128-16AE
• Description: 8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
• Manufacturer: ATMEL Corporation

Fuse Bits
324
AT90CAN128
Table 122. Lock Bit Protection Modes
Notes:
The AT90CAN128 has three Fuse bytes. Table 123, Table 124 and Table 125 describe
briefly the functionality 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 123. Extended Fuse Byte
Notes:
Table 124. Fuse High Byte
Fuse Extended
Byte
–
–
–
–
BODLEVEL2
BODLEVEL1
BODLEVEL0
TA0SEL
Fuse High
Byte
OCDEN
JTAGEN
SPIEN
WDTON
EESAVE
2
3
4
Memory Lock Bits
(1)
1. Program the Fuse bits and Boot Lock bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed
1. See Table 20 on page 51 for BODLEVEL Fuse decoding.
(4)
(3)
(5)
(1)
(1)
(1)
Bit
No
7
6
5
4
3
1
0
0
7
6
5
4
3
2
1
0
Bit
No
Description
Enable OCD
Enable JTAG
Enable Serial Program and Data
Downloading
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
Description
–
–
–
–
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
(Reserved for factory tests)
0
0
1
Protection Type
SPM is not allowed to write to the Boot Loader section.
SPM is not allowed to write to the Boot Loader section, and
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.
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.
(1)(2)
(Continued)
Default Value
1 (unprogrammed, OCD disabled)
0 (programmed, JTAG enabled)
0 (programmed, SPI prog. enabled)
1 (unprogrammed)
1 (unprogrammed, EEPROM not
preserved)
Default Value
1
1
1
1
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
4250C–CAN–03/04