There's nothing really fancy about a timecode slate. They are typically provided by the sound department since sound also provides timecode to camera. You don't really need to worry about jamming them since sound deals with that. When you open the sticks, the numbers are illuminated. When you close them, the numbers stop for a second, then turn off.
I've heard 'jamming' but I'm not sure what it is. IANA professional cinematographer, so the equipment I use when I do shoot is old-school. Can you explain? I have an idea that the timecode slate sends a signal to the camera, which records the time on the slate onto the film.
Regarding AatonCode, I found this .pdf.
The XTRprod can accept timecode information in both ASCII and SMPTE form, and work with all standard timecode devices. Because the same time address is running in both the camera and the sound recorder, a slate is no longer needed for syncing purposes; synchronization becomes fully automatic during the film/tape transfer or later post-production stages.
That sounds like the camera gets its information from the recorder, and they both have the same code. So I'm not sure that helps me as far as the concept behind a timecode slate.