The PIC-Key PS/2 port is wired as follows.
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- keyboard data
- mouse data
- Ground
- +5V
- keyboard clock
- mouse clock
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This differs from the PS/2 spec which says that pins 2 and 6 should
have no connection. This pinout was chosen because
- it allows both keyboard and mouse to fit in one standard connector
- it matches the pinout on many laptop computers
- a commodity "Y" cable is available which splits the keyboard and mouse connectors
The following diagrams illustrate many common connection scenarios.
| If your current setup works like this |
Connect your PIC-Key like this |
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| PC with mouse port, and Y cable (below) does not work (i.e. original IBM PS/2). |
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| This will require some additional gender-benders. |
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| If your current setup works like this |
Connect your PIC-Key like this |
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| PC with or without PS/2 mouse port, where the PS/2 keyboard port is properly wired (i.e. some laptops). |
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| This is ideal, as it minimizes the number of cables needed. |
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| If your current setup works like this |
Connect your PIC-Key like this |
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| PC without mouse port, and Y cable (above) does not work. |
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For the truly curious, here's how the Y cable is wired. Again, this
is a commodity part, which should be available through most good
computer supply mail order places.
