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I have following trackpoint module of recent thinkpad x390. There are some info about older modules, most useful(combined) one is: https://deskthority.net/wiki/TrackPoint_Hardware

However, i found no info about this trackpoint module (which seems most of newer thinkpads use).

  • IC has label "33306B 3900 1851 BG18CK2" (no datasheet on internet)
  • On the backside: pcb has label "PSG8E8-Rev.2 AD19021218" (no results on google)

Current findings:

  • I'm only guessing 2nd pin of 8pin FPC connector is the GND. I have no idea what are the others.

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  • \$\begingroup\$ Yep, there are nothing ic/electronics related result when "bg18ck2" is searched \$\endgroup\$
    – Garid
    Apr 27 '21 at 17:11
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I had to know as well so i hooked up a logic analyzer to it installed in a thinkpad. it's not tested yet, so maybe be a bit careful but my measurements say that, from left to right:

pin 0:clock
pin 1:GND
pin 2:mouse1
pin 3:mouse2
pin 4:mouse3
pin 5:reset
pin 6:data
pin 7:VCC

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  • \$\begingroup\$ OH yeah, I couple of weeks ago, I did with Logic analyzer too. Appreciate for answering for that, I forgot to comment my findings. \$\endgroup\$
    – Garid
    Nov 22 '21 at 6:16

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