mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-21 00:53:23 +00:00
50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
|
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)
|