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added note about external pull resistor on DATA line.

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tmk 2011-02-13 23:02:08 +09:00
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adb/README
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@ -8,6 +8,10 @@ This firmware converts ADB keyboard protocol to USB.
Build Build
----- -----
0. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data). 0. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data).
You need a external pull-up resistor on DATA line in most case,
in particular when you want to use a long or coiled cable.
This converter uses AVR's internal pull-up, but it seems to be too weak.
The external pull-up resistor is strongly recommended.
PSW line is optional. See ADB.txt for details. PSW line is optional. See ADB.txt for details.
1. Define following macros for ADB connection in config.h: 1. Define following macros for ADB connection in config.h:
ADB_PORT ADB_PORT