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Fuse bits for AVR ATMega8 Ponyprog

It is about the question of how the fuse bits must be set in most cases.

And here it is, the collection of the default settings most frequently used the fuse bits for ATmega8.
Fuse bits for AVR ATMega8 Ponyprog

First, verify with Datasheets, because some of Atmega are made for only lower frequency response.
Like ATMega8L will works till 8Mhz frequency.

I am no responsible for any loss or IC damage, only one wrong fuse bit will make non responsive ic. That may be recover by fusebit doctor.

1 MHz internal RC Oscillator


Low Fuse


  • 11100001
  • Brown-out detection level at VCC = 2.7 V; [BODLEVEL = 1]
  • Int. RC Osc. 1 MHz start-up time: 6 CK + 64 ms; [CHSEL = 0001 SUT = 10]; defaultValue


High Fuse


  • 11011001
  • Serial program downloading (SPI) enabled; [SPIEN = 0]
  • Boot Flash section size = 1024 words start address = $ 0C00 boat; [BOOTSZ = 00]; defaultValue

Lockbits


  • 11111111
  • Mode 1: No memory lock features enabled
  • Application Protection Mode 1: No lock on SPM and LPM in Application Section
  • Boot Loader Protection Mode 1: No lock on SPM and LPM in Boot Loader Section

8 MHz internal RC Oscillator


Low Fuse


  • 11100100
  • Brown-out detection level at VCC = 2.7 V; [BODLEVEL = 1]
  • Int. RC Osc. 8 MHz start-up time: 6 CK + 64 ms; [CKSEL = 0100 SUT = 10]

High Fuse


  • 11011001
  • Serial program downloading (SPI) enabled; [SPIEN = 0]
  • Boot Flash section size = 1024 words start address = $ 0C00 boat; [BOOTSZ = 00]; defaultValue

Lockbits


  • 11111111
  • Mode 1: No memory lock features enabled
  • Application Protection Mode 1: No lock on SPM and LPM in Application Section
  • Boot Loader Protection Mode 1: No lock on SPM and LPM in Boot Loader Section

3-8 Mhz external crystal


Low Fuse


  • 11111111
  • Brown-out detection level at VCC = 2.7 V; [BODLEVEL = 1]
  • . External Crystal / Resonator High Freq, Start-up time: 16K CK + 64 ms; [CKSEL = 1111 SUT = 11]

High Fuse


  • 11011001
  • Serial program downloading (SPI) enabled; [SPIEN = 0]
  • Boot Flash section size = 1024 words start address = $ 0C00 boat; [BOOTSZ = 00]; defaultValue

Lockbits


  • 11111111
  • Mode 1: No memory lock features enabled
  • Application Protection Mode 1: No lock on SPM and LPM in Application Section
  • Boot Loader Protection Mode 1: No lock on SPM and LPM in Boot Loader Section

8-16 Mhz external crystal

Low Fuse


  • 11111111
  • Brown-out detection level at VCC = 2.7 V; [BODLEVEL = 1]
  • . External Crystal / Resonator High Freq, Start-up time: 16K CK + 64 ms; [CKSEL = 1111 SUT = 11]
High Fuse


  • 11001001
  • Serial program downloading (SPI) enabled; [SPIEN = 0]
  • Boot Flash section size = 1024 words start address = $ 0C00 boat; [BOOTSZ = 00]; defaultValue
  • CKOPT fuse (operation dependent of CKSEL fuses); [CKOPT = 0]

Lockbits


  • 11111111
  • Mode 1: No memory lock features enabled
  • Application Protection Mode 1: No lock on SPM and LPM in Application Section
  • Boot Loader Protection Mode 1: No lock on SPM and LPM in Boot Loader Section


PonyProg

1 MHz internal RC Oscillator

Lockbits


  • 11111111

High Fuse


  • 11011001
  • SPIEN
  • BOOTSZ1
  • BOOTSZ0

Low Fuse


  • 11100001
  • SUT0
  • CKSEL3
  • CKSEL2
  • CHSEL1

8 MHz internal RC Oscillator

Lockbits

  • 11111111
High Fuse

  • 11011001
  • SPIEN
  • BOOTSZ1
  • BOOTSZ0
Low Fuse

  • 11100100
  • SUT0
  • CKSEL3
  • CKSEL1
  • CHSEL0

8-16 Mhz external crystal



Lockbits

  • 11111111
High Fuse

  • 11001001
  • SPIEN
  • CKOPT
  • BOOTSZ1
  • BOOTSZ0
Low Fuse

  • 11111111


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