ps2_usb/README.vusb

   1 V-USB Support
   2 =============
   3 You can also use this converter on ATmega(168/328) with V-USB instead of Teensy.
   4 The converter on V-USB lacks some features for now: USB NKRO and System/Media control.
   5
   6 To build a firmware use Makefile.vusb instead of Makefile.
   7
   8
   9 Circuit
  10 -------
  11                 +---+   +---------------+
  12 USB            GND  |   |   ATmega168   |
  13 ===                 C3  |               |
  14 5V <-------+--------+---|Vcc,AVCC       |        PS/2
  15            R1           |               |        ====
  16 D- <----+--+-----R2-----|INT1        RXD|------->DATA
  17 D+ <----|---+----R3-----|INT0        XCK|------->CLOCK
  18         Z1  Z2          |               |      ->5V
  19 GND<----+---+--+--+-----|GND            |      ->GND
  20                |  |     |               |
  21                |  C2-+--|XTAL1          |
  22                |     X1 |               |
  23                +--C3-+--|XTAL2          |
  24                         +---------------+
  25 R1:     1.5K Ohm
  26 R2,R3:  68 Ohm
  27 Z1,Z2:  Zenner 3.6V
  28 C1,C2:  22pF
  29 C3:     0.1uF
  30 X1:     Crystal 20MHz(16MHz/12MHz)
  31
  32
  33 This is my V-USB converter on breadboard.
  34 [IMG]http://i.imgur.com/8jJCZl.jpg[/IMG]
  35
  36
  37 EOF