ATmega8515/8535 Fuse Calculator
Clock Source:
External Clock Source
0.1-0.9 MHz
0.9-3 MHz
3-8 MHz
8-12 MHz
~ 32 kHz
0.4-0.9 MHz (Ceramic)
0.9-3 MHz
3-16 MHz
1 MHz *
2 MHz
4 MHz
8 MHz
Start-up Time:
18 CK (BOD)
18 CK + 4.1 ms (fast)
18 CK + 65 ms (slow)
6 CK + 4.1 ms (fast/BOD, not close to max. freq.)
258 CK + 4.1 ms (fast, not close to max. freq.)
258 CK + 65 ms (slow, not close to max. freq.)
1k CK (BOD, stable freq. at start-up)
1k CK + 4.1 ms (fast, stable freq. at start-up)
1k CK + 65 ms (slow, stable freq. at start-up)
1k CK + 4.1 ms (fast/BOD)
1k CK + 65 ms (slow)
32k CK + 65 ms (stable freq. at start-up)
16k CK (BOD)
16k CK + 4.1 ms (fast)
16k CK + 65 ms (slow)
6 CK (BOD)
6 CK + 4.1 ms (fast)
6 CK + 65 ms (slow) *
Enable Brown-out Detector
High Brown-out Level (4V instead of 2.7V)
Low
Set Reset Vector to Boot Block
Boot Block Size:
1024 words / 2048 bytes *
512 words / 1024 bytes
256 words / 512 bytes
128 words / 256 bytes
Preserve EEPROM through Chip Erase
Ext. Clock/RC Osc./Low-freq. Crystal: enable internal Capacitors (36 pF)
Internal R/C Osc.: leave unchecked!
External Crystal: enable full swing (neccessary for >8 MHz)
Enable SPI programming *
Watchdog Timer always on
Enable AT90S4414/AT90S8515/AT90S8535 compatibility mode
High
* =
default