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| author | Jack Humbert <jack.humb@gmail.com> | 2017-05-27 18:14:21 -0400 |
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| committer | Jack Humbert <jack.humb@gmail.com> | 2017-05-27 18:14:21 -0400 |
| commit | 7e84b0e3b3d4d5f53c774465c465a17bafb06f7a (patch) | |
| tree | 2d5f1d4049bf15c80e84aeeb897172f4a6e8ac49 /docs/FUSE.txt | |
| parent | 704794bae3bf96541b0362ea38b84706d5ee6958 (diff) | |
| download | qmk_firmware-7e84b0e3b3d4d5f53c774465c465a17bafb06f7a.tar.gz qmk_firmware-7e84b0e3b3d4d5f53c774465c465a17bafb06f7a.zip | |
move old doc to docs
Diffstat (limited to 'docs/FUSE.txt')
| -rw-r--r-- | docs/FUSE.txt | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/docs/FUSE.txt b/docs/FUSE.txt new file mode 100644 index 0000000000..99ddd2d186 --- /dev/null +++ b/docs/FUSE.txt @@ -0,0 +1,50 @@ +Atmega32u4 Fuse/Lock Bits for Planck/Atomic/Preonic +========================= + + Low Fuse: 0x5E + High Fuse: 0x99 + Extended Fuse: 0xF3 + Lock Byte: 0xFF + + +ATMega168P Fuse/Lock Bits +========================= +This configuration is from usbasploader's Makefile. + + HFUSE 0xD6 + LFUSE 0xDF + EFUSE 0x00 + LOCK 0x3F(intact) + +#--------------------------------------------------------------------- +# ATMega168P +#--------------------------------------------------------------------- +# Fuse extended byte: +# 0x00 = 0 0 0 0 0 0 0 0 <-- BOOTRST (boot reset vector at 0x1800) +# \+/ +# +------- BOOTSZ (00 = 2k bytes) +# Fuse high byte: +# 0xd6 = 1 1 0 1 0 1 1 0 +# ^ ^ ^ ^ ^ \-+-/ +# | | | | | +------ BODLEVEL 0..2 (110 = 1.8 V) +# | | | | + --------- EESAVE (preserve EEPROM over chip erase) +# | | | +-------------- WDTON (if 0: watchdog always on) +# | | +---------------- SPIEN (allow serial programming) +# | +------------------ DWEN (debug wire enable) +# +-------------------- RSTDISBL (reset pin is enabled) +# Fuse low byte: +# 0xdf = 1 1 0 1 1 1 1 1 +# ^ ^ \ / \--+--/ +# | | | +------- CKSEL 3..0 (external >8M crystal) +# | | +--------------- SUT 1..0 (crystal osc, BOD enabled) +# | +------------------ CKOUT (if 0: Clock output enabled) +# +-------------------- CKDIV8 (if 0: divide by 8) + + +# Lock Bits +# 0x3f = - - 1 1 1 1 1 1 +# \ / \-/ \-/ +# | | +----- LB 2..1 (No memory lock features enabled) +# | +--------- BLB0 2..1 (No restrictions for SPM or LPM accessing the Application section) +# +--------------- BLB1 2..1 (No restrictions for SPM or LPM accessing the Boot Loader section) + |