| ec1bef8e |
1 | fnordlicht original hardware |
| 2 | =========================================================================== |
| 3 | |
| 4 | atmega8: |
| 5 | low fuse byte: |
| 6 | clock-source external xtal: CHKSEL = 0 |
| 7 | |
| 8 | -> default: 0xe1 |
| 9 | new: 0b11100000 = 0xe0 |
| 10 | |
| 11 | high fuse byte (with bootloader, leave at 0xd9 for use without bootloader): |
| 12 | 512 words bootloader size: BOOTSZ0 = 1 |
| 13 | BOOTSZ1 = 0 |
| 14 | |
| 15 | reset vector, jump to bootloader on reset: BOOTRST = 0 |
| 16 | |
| 17 | -> default: 0b11011001 = 0xd9 |
| 18 | new: 0b11011010 = 0xda |
| 19 | |
| 20 | lock byte: |
| 21 | |
| 22 | SPM is not allowed to write to the Boot Loader section BLB12 = 1 |
| 23 | BLB11 = 0 |
| 24 | -> default: 0x3f |
| 25 | new: 0x2f |
| 26 | |
| 27 | |
| 28 | atmega88/168: |
| 29 | low fuse byte: |
| 30 | clock-source external xtal: CHKSEL = 0 |
| 31 | |
| 32 | disable system clock divide by 8: CKDIV8 = 1 |
| 33 | |
| 34 | -> default: 0b01100010 = 0x62 |
| 35 | new: 0b11100000 = 0xe0 |
| 36 | |
| 37 | |
| 38 | high fuse byte: |
| 39 | no eeprom erase on chip erase: EESAVE = 0 |
| 40 | |
| 41 | -> default: 0b11011111 = 0xdf |
| 42 | new: 0b11010111 = 0xd7 |
| 43 | |
| 44 | |
| 45 | extended fuse byte: |
| 46 | 1024 words bootloader size: BOOTSZ0 = 0 |
| 47 | BOOTSZ1 = 0 |
| 48 | |
| 49 | reset vector, jump to bootloader on reset: BOOTRST = 0 |
| 50 | |
| 51 | -> default: 0x01 |
| 52 | new: 0x00 |
| 53 | |
| 54 | lock byte: |
| 55 | SPM is not allowed to write to the Boot Loader section BLB12 = 1 |
| 56 | BLB11 = 0 |
| 57 | |
| 58 | -> default: 0b111111 = 0x3f |
| 59 | new: 0b101111 = 0x2f |
| 60 | |
| 61 | |
| 62 | fnordlichtmini hardware |
| 63 | =========================================================================== |
| 64 | |
| 65 | atmega8: |
| 66 | low fuse byte: |
| 67 | clock-source external xtal: CHKSEL[1..3] = 111 |
| 68 | slowly rising power, 65ms startup timeout: CHKSEL[0] = 1, SUT[0..1] = 11 |
| 69 | enable brown-out detector: BODEN = 0 |
| 70 | require ~4v for safe operation: BODLEVEL = 0 |
| 71 | |
| 72 | -> default: 0xe1 |
| 73 | new: 0b00111111 = 0x3f |
| 74 | |
| 75 | high fuse byte (with bootloader, leave at 0xd9 for use without bootloader): |
| 76 | 512 words bootloader size: BOOTSZ0 = 1 |
| 77 | BOOTSZ1 = 0 |
| 78 | |
| 79 | reset vector, jump to bootloader on reset: BOOTRST = 0 |
| 80 | |
| 81 | -> default: 0b11011001 = 0xd9 |
| 82 | new: 0b11011010 = 0xda |
| 83 | |
| 84 | lock byte: |
| 85 | |
| 86 | SPM is not allowed to write to the Boot Loader section BLB12 = 1 |
| 87 | BLB11 = 0 |
| 88 | -> default: 0x3f |
| 89 | new: 0x2f |
| 90 | |
| 91 | |
| 92 | fnordlicht-controller |
| 93 | ========================================================================== |
| 94 | |
| 95 | atmega168: |
| 96 | low fuse byte: |
| 97 | clock-source external xtal: CHKSEL = 0111 |
| 98 | |
| 99 | disable system clock divide by 8: CKDIV8 = 1 |
| 100 | |
| 101 | -> default: 0b01100010 = 0x62 |
| 102 | new: 0b11100111 = 0xe7 |
| 103 | |
| 104 | |
| 105 | high fuse byte: |
| 106 | |
| 107 | -> default: 0b11011111 = 0xdf |
| 108 | |
| 109 | |
| 110 | extended fuse byte: |
| 111 | 1024 words bootloader size: BOOTSZ0 = 0 |
| 112 | BOOTSZ1 = 0 |
| 113 | |
| 114 | reset vector, jump to bootloader on reset: BOOTRST = 0 |
| 115 | |
| 116 | -> default: 0b001 = 0x01 |
| 117 | new: 0b000 = 0x00 |
| 118 | |
| 119 | |
| 120 | lock byte: |
| 121 | SPM is not allowed to write to the Boot Loader section BLB12 = 1 |
| 122 | BLB11 = 0 |
| 123 | |
| 124 | -> default: 0b111111 = 0x3f |
| 125 | new: 0b101111 = 0x2f |
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