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author | IBNobody <ibnobody@gmail.com> | 2016-06-11 13:28:27 -0500 |
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committer | IBNobody <ibnobody@gmail.com> | 2016-06-11 13:28:27 -0500 |
commit | 50621a2e6a7d03add0c202e5b2698338c7fbbf5b (patch) | |
tree | d6f002712c22e8cf4523e04a9da889c7ec379d6b /doc/FUSE.txt | |
parent | 26277dbdf40ba7247981361c956ea44c92bf76ea (diff) | |
parent | d9e4dad0a828a8a904f44dda090a4d6d08fe2948 (diff) |
Merge remote-tracking branch 'remotes/jackhumbert/master'
Diffstat (limited to 'doc/FUSE.txt')
-rw-r--r-- | doc/FUSE.txt | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/doc/FUSE.txt b/doc/FUSE.txt new file mode 100644 index 0000000000..40055e5ab1 --- /dev/null +++ b/doc/FUSE.txt @@ -0,0 +1,40 @@ +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) |