參數(shù)資料
型號： MR80C52XXX-25SHXXX:R
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44
封裝： LCC-44
文件頁數(shù)： 7/176頁
文件大?。?/td> 4226K
104
8126F–AVR–05/12
ATtiny13A
17.2
Fuse Bytes
The ATtiny13A has two fuse bytes. Table 17-3 on page 104 and Table 17-4 on page 104
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.
Notes:
1. Enables SPM instruction. See “Self-Programming the Flash” on page 98.
2. DWEN must be unprogrammed when lock Bit security is required. See “Program And Data
3. See Table 18-6 on page 120 for BODLEVEL fuse decoding.
4. See “Alternate Functions of Port B” on page 55 for description of RSTDISBL and DWEN fuses.
When programming the RSTDISBL fuse, High-voltage Serial programming has to be used to
change fuses to perform further programming.
Notes:
1. The SPIEN fuse is not accessible in SPI Programming mode.
2. Programming this fues will disable the Watchdog Timer Interrupt. See “Watchdog Timer” on
page 38 for details.
4. The default value of SUT[1:0] results in maximum start-up time for the default clock source.
See Table 18-3 on page 119 for details.
5. The default setting of CKSEL[1:0] results in internal RC Oscillator @ 9.6 MHz. See Table 18-3
on page 119 for details.
Table 17-3.
Fuse High Byte
Fuse Bit
Bit No
Description
Default Value
–
7
–
1 (unprogrammed)
–
6
–
1 (unprogrammed)
–
5
–
1 (unprogrammed)
4
Self Programming Enable
1 (unprogrammed)
DWEN(2)
3
debugWire Enable
1 (unprogrammed)
2
Brown-out Detector trigger level
1 (unprogrammed)
1
Brown-out Detector trigger level
1 (unprogrammed)
0
External Reset disable
1 (unprogrammed)
Table 17-4.
Fuse Low Byte
Fuse Bit
Bit No
Description
Default Value
SPIEN(1)
7
Enable Serial Programming and Data
Downloading
0 (programmed)
(SPI prog. enabled)
EESAVE
6
Preserve EEPROM memory through
Chip Erase
1 (unprogrammed)
(memory not preserved)
WDTON(2)
5
Watchdog Timer always on
1 (unprogrammed)
4
Divide clock by 8
0 (programmed)
3
Select start-up time
1 (unprogrammed)
2
Select start-up time
0 (programmed)
1
Select Clock source
1 (unprogrammed)
0
Select Clock source
0 (programmed)
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