diff options
| author | tmk <nobody@nowhere> | 2011-02-13 23:02:08 +0900 |
|---|---|---|
| committer | tmk <nobody@nowhere> | 2011-02-13 23:02:08 +0900 |
| commit | a96085faf6afec5362bef7206cb500d9aae21362 (patch) | |
| tree | f8abd7a433b3e99ace4390b7a526b112fe3b2a5e | |
| parent | 5bc29b50ef48196dcd5459287d8d6c91b759c83b (diff) | |
added note about external pull resistor on DATA line.
| -rw-r--r-- | adb/README | 4 |
1 files changed, 4 insertions, 0 deletions
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 |