參數(shù)資料
型號: M306V5EESP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PDIP64
封裝: 0.750 INCH, PLASTIC, SDIP-64
文件頁數(shù): 25/152頁
文件大?。?/td> 1963K
代理商: M306V5EESP
148
ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
20.2
Fuse Bytes
ATtiny25/45/85 has three fuse bytes, as described in Table 20-3, Table 20-4, and Table 20-5. Note that fuses are
read as logical zero, “0”, when programmed.
Notes:
1. Enables SPM instruction. See “Self-Programming the Flash” on page 141.
Notes:
1. Controls use of RESET pin. See “Alternate Functions of Port B” on page 60.
2. After this fuse has been programmed device can be programmed via high-voltage serial mode, only.
3. Must be unprogrammed when lock bit security is required. See “Program And Data Memory Lock Bits” on page
4. This fuse is not accessible in SPI programming mode.
Table 20-3.
Fuse Extended Byte
Fuse High Byte
Bit No
Description
Default Value
7
-
1 (unprogrammed)
6
-
1 (unprogrammed)
5
-
1 (unprogrammed)
4
-
1 (unprogrammed)
3
-
1 (unprogrammed)
2
-
1 (unprogrammed)
1
-
1 (unprogrammed)
SELFPRGEN (1)
0
Self-programming enabled
1 (unprogrammed)
Table 20-4.
Fuse High Byte
Fuse High Byte
Bit No
Description
Default Value
RSTDISBL (1) (2)
7
External reset disabled
1 (unprogrammed)
6
DebugWIRE enabled
1 (unprogrammed)
SPIEN (4)
5
Serial program and data download
enabled
0 (programmed)
(SPI prog. enabled)
WDTON (5)
4
Watchdog timer always on
1 (unprogrammed)
EESAVE
3
EEPROM preserves chip erase
1 (unprogrammed)
(EEPROM not preserved)
BODLEVEL2 (6)
2
Brown-out Detector trigger level
1 (unprogrammed)
BODLEVEL1 (6)
1
Brown-out Detector trigger level
1 (unprogrammed)
BODLEVEL0 (6)
0
Brown-out Detector trigger level
1 (unprogrammed)
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