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| -rw-r--r-- | adb/README | 4 |
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diff --git a/adb/README b/adb/README index d6c9ec9aa4..b4bd35bb33 100644 --- a/adb/README +++ b/adb/README @@ -8,6 +8,10 @@ This firmware converts ADB keyboard protocol to USB. Build ----- 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. 1. Define following macros for ADB connection in config.h: ADB_PORT |