Version 2 (modified by 12 years ago) ( diff ) | ,
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random notes on the AT90USB...
I have an AT90USBkey with the DFU bootloader.
http://sourceforge.net/projects/dfu-programmer/files/ seems to be the right tool to flash it.
Reserved pins
On the dev board :
- PF0 = tempertature sensor. May or may not be a problem.
- PF3 = resistors to sense power supply.
- PE0/PE1 = on board flash chip select
- PE2 = HWB button.
- PD7..4 = LEDs
- PB7..5 and PE5/4 = Joystick
Leaves us with :
- PA 0..7
- PB 0..4
- PC 0..7
- PD 0..3
- PE 6..7
- PF 1,2,4..7
33 free I/O pins. Some more can be used in some cases.
Note:
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