ATA5771_09 ATMEL [ATMEL Corporation], ATA5771_09 Datasheet - Page 218
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ATA5771_09
Manufacturer Part Number
ATA5771_09
Description
Microcontroller with UHF ASK/FSK Transmitter
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA5771_09.pdf
(287 pages)
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21.2
7701C–AVR–12/08
Fuse Bytes
The ATtiny24/44/84 has three Fuse bytes.
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 21-3.
Table 21-4.
Notes:
SELFPRGEN
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
Fuse High Byte
Fuse High Byte
(2)
(3)
1. See
2. DWEN must be unprogrammed when Lock Bit security is required. See
3. The SPIEN Fuse is not accessible in SPI Programming mode.
4. See
5. See
(4)
(1)
Fuses. When programming the RSTDISBL Fuse, High-voltage Serial programming has to be
used to change fuses to perform further programming
Memory Lock Bits” on page
details.
(5)
(5)
(5)
Fuse Extended Byte
Fuse High Byte
”Alternate Functions of Port B” on page 68
”WDT Configuration as a Function of the Fuse Settings of WDTON” on page 44
Table 22-5 on page 182
Bit No
0
7
6
5
4
3
2
1
Bit No
7
6
6
4
3
2
1
0
Description
-
-
-
-
-
-
-
Self-Programming Enable
Description
External Reset disable
DebugWIRE Enable
Enable Serial Program and Data
Downloading
Watchdog Timer always on
EEPROM memory is preserved through
the Chip Erase
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
164.
for BODLEVEL Fuse decoding.
Table 21-4 on page 165
for description of RSTDISBL and DWEN
ATtiny24/44/84
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
to
Table 21-5 on page 166
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed, SPI
prog. enabled)
1 (unprogrammed)
1 (unprogrammed,
EEPROM not
preserved)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
”Program And Data
for
165
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