:R1, R2 Knock Channel 1 (10..22k) (analog signal amplitude gain can be adjusted with these; but also in the digital domain - in config)

:R3, R4 Knock Channel 2 (same as R1,R2)

:R17 1M

:C1 Knock Channel 1 (100nF)

:C2 Knock Channel 2 (same as C1)

:C14 0.22uF

:C16 100nF

:C18, C19 22pF

:Y2 4MHz XTAL (16MHz might work with matching config)

:U5 TPIC8101DW (not in rescue kit! Optional, see WebShop)

V3.2: if you ordered knock-kit (in same order as genboard) than U5=TPIC8101DW and Y2=crystal already soldered onboard (crystal missing on a few boards sent out before 20041030.)

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Here you find the top-side components, the second channel uses components on the bottom side too. (thanks to Mr Grogan for pic)

The knock sensor chip installation:

Pin 1 points to the connectors-side. (so pin 1 points to the short side of the board)

The crystal goes next to the chip.

For the 2nd channel, the following components are also needed:

* 100nF (or 220nF, does not matter which) in the diagonal position

* 22k in the diagonal position. As this is in series with the 100nF, they can be swapped: it does NOT matter if the resistor or the cap is closer to the input

* 22k (on top side, next to R2)

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v3.3

The knockchip and 4MHz crystal is installed (if ordered v3.3 with knock-kit), the only thing needed is to connect the sensor input through the 3 pin header (pads) at the northwest corner (looking at the "top") :

* North pad (close to board-edge): knockA signal (channel 0) (usually through EC18pin3)

* Middle pad: knock GND (usually through EC18pin2)

* Southern pad: knockB signal (channel 1) - usually not used

TODO: take pictures of board region around knock chip

If the knock signal is not routed via EC18, it can be routed through a connector or flying loom cable mounted through frontplate or endplate.

* Back to GenBoard/Manual