diff options
author | tmk <[email protected]> | 2015-04-10 01:32:04 +0900 |
---|---|---|
committer | tmk <[email protected]> | 2015-04-10 01:32:04 +0900 |
commit | 1a02ebcc612e9a9c0d87e02295c7258de3a70ccc (patch) | |
tree | e517f3c70bb2d542797e57d13e9023c84af230fb /tmk_core/doc/FUSE.txt | |
parent | 6746e37088ce8ba03529c1226bd216705edb2b1f (diff) | |
parent | a074364c3731d66b56d988c8a6c960a83ea0e0a1 (diff) | |
download | qmk_firmware-1a02ebcc612e9a9c0d87e02295c7258de3a70ccc.tar.gz qmk_firmware-1a02ebcc612e9a9c0d87e02295c7258de3a70ccc.zip |
Merge commit 'a074364c3731d66b56d988c8a6c960a83ea0e0a1' as 'tmk_core'
Diffstat (limited to 'tmk_core/doc/FUSE.txt')
-rw-r--r-- | tmk_core/doc/FUSE.txt | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tmk_core/doc/FUSE.txt b/tmk_core/doc/FUSE.txt new file mode 100644 index 0000000000..40055e5ab1 --- /dev/null +++ b/tmk_core/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) |