The IC inside the CDI

[tzr-v4]

Off topic yes and no ....
I think 3XC CDI is not a real CDI but a TCI as it needs a battery to operate correctly.
No a 3XV expert.
http://www.sportdevices.com/ignition/ignition.htm

A programmable IC can be replaced by another one.
If you monitor the signals at each pins of the IC you'll find what they do.
As there is 2 pickups and 2 HT coils the IC includes 2 separate ignition modules.
You may find :
- 1 Speed restriction signal (input)
- 1 TPS signal (input)
- 2 Powerjets (output)
- 2 ignition signals (input)
- 2 coil signals (output)
- 2 YPVS signal (output)

I've to check if my ICP12 IC could cope with these extra inputs and could drive 2 separate ignition systems.

Olivier.

[yanw]

The later CDI also supports the oil solenoids, just to complicate matters....

[tzr-v4]

Oil solenoid is not a problem but it add an output.

The most difficult think is the monitor the signals.
The best solution is to setup a test bench as done Louis for the 3MA or 41juergen to read the CDI and YPVS curves.

The speed input pin could be setup for oil solenoid output.

If a 3XV owner is able to setup a bench and get the signal's specification I could check if my ICP12 setup and firmware could be adapted to 3XV CDI.