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Circuitry sample for PS/2 Mouse #3959

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Sep 23, 2018
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Circuitry sample for PS/2 Mouse #3959

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18 changes: 18 additions & 0 deletions docs/feature_ps2_mouse.md
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Expand Up @@ -6,6 +6,24 @@ To hook up a Trackpoint, you need to obtain a Trackpoint module (i.e. harvest fr

There are three available modes for hooking up PS/2 devices: USART (best), interrupts (better) or busywait (not recommended).

### The Cirtuitry between Trackpoint and Controller

To get the things working, a 4.7K drag is needed between the two lines DATA and CLK and the line 5+.

```

DATA ----------+--------- PIN
|
4.7K
|
MODULE 5+ --------+--+--------- PWR CONTROLLER
|
4.7K
|
CLK ------+------------ PIN
```


### Busywait Version

Note: This is not recommended, you may encounter jerky movement or unsent inputs. Please use interrupt or USART version if possible.
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