forked from forks/qmk_firmware
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
|
V-USB Support
|
||
|
|
=============
|
||
|
|
You can also use this converter on ATmega(168/328) with V-USB instead of Teensy.
|
||
|
|
The converter on V-USB lacks some features for now: USB NKRO and System/Media control.
|
||
|
|
|
||
|
|
To build a firmware use Makefile.vusb instead of Makefile.
|
||
|
|
|
||
|
|
|
||
|
|
Circuit
|
||
|
|
-------
|
||
|
|
+---+ +---------------+
|
||
|
|
USB GND | | ATmega168 |
|
||
|
|
=== C3 | |
|
||
|
|
5V <-------+--------+---|Vcc,AVCC | PS/2
|
||
|
|
R1 | | ====
|
||
|
|
D- <----+--+-----R2-----|INT1 RXD|------->DATA
|
||
|
|
D+ <----|---+----R3-----|INT0 XCK|------->CLOCK
|
||
|
|
Z1 Z2 | | ->5V
|
||
|
|
GND<----+---+--+--+-----|GND | ->GND
|
||
|
|
| | | |
|
||
|
|
| C2-+--|XTAL1 |
|
||
|
|
| X1 | |
|
||
|
|
+--C3-+--|XTAL2 |
|
||
|
|
+---------------+
|
||
|
|
R1: 1.5K Ohm
|
||
|
|
R2,R3: 68 Ohm
|
||
|
|
Z1,Z2: Zenner 3.6V
|
||
|
|
C1,C2: 22pF
|
||
|
|
C3: 0.1uF
|
||
|
|
X1: Crystal 20MHz(16MHz/12MHz)
|
||
|
|
|
||
|
|
|
||
|
|
This is my V-USB converter on breadboard.
|
||
|
|
[IMG]http://i.imgur.com/8jJCZl.jpg[/IMG]
|
||
|
|
|
||
|
|
|
||
|
|
EOF
|