Atmega328-PU speed

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hi everyone!

i have issue atmega328-pu; i've changed signature in "avrdude.config" file program mcu using arduino ide, i've choosed aduino uno board, , when uploaded blink sketch atmega328-pu blinking speed more slow suspected.

i tried sketch , without 16mhz crystal. blink still slow.

any idea  :smiley-eek:

here boards.txt file :

code: [select]
# see: http://code.google.com/p/arduino/wiki/platforms

##############################################################

uno.name=arduino uno
uno.upload.protocol=arduino
uno.upload.maximum_size=32256
uno.upload.speed=115200
uno.bootloader.low_fuses=0xff
uno.bootloader.high_fuses=0xde
uno.bootloader.extended_fuses=0x05
uno.bootloader.path=optiboot
uno.bootloader.file=optiboot_atmega328.hex
uno.bootloader.unlock_bits=0x3f
uno.bootloader.lock_bits=0x0f
uno.build.mcu=atmega328p
uno.build.f_cpu=16000000l
uno.build.core=arduino
uno.build.variant=standard



the boards.txt in arduino sketchbook :

code: [select]

##############################################################

atmega328bb.name=atmega328 on breadboard (8 mhz internal clock)

atmega328bb.upload.protocol=stk500
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600

atmega328bb.bootloader.low_fuses=0xe2
atmega328bb.bootloader.high_fuses=0xda
atmega328bb.bootloader.extended_fuses=0x05
atmega328bb.bootloader.path=arduino:atmega
atmega328bb.bootloader.file=atmegaboot_168_atmega328_pro_8mhz.hex
atmega328bb.bootloader.unlock_bits=0x3f
atmega328bb.bootloader.lock_bits=0x0f

atmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000l
atmega328bb.build.core=arduino:arduino
atmega328bb.build.variant=arduino:standard


and part i've changed on avrdude.config :

code: [select]

 signature = 0x1e 0x95 0x14;

there must zillion forum posts topic:
here




Arduino Forum > Using Arduino > Microcontrollers > Atmega328-PU speed


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