Why does the PCD2/3.H210 generate too few pulses in high temperature environments?

FAQ #100727

 

Symptom
If the module is exposed to high environment temperatures and a very low frequency range (9.5 – 2431 Hz) is configured, it may happen that the module does generate too few output pulses. In this situation 1 to 4 pulses per revolution can be "forgotten".

 

Reason
This phenomenon is caused by a timing problem of the FPGA programmation.

Solution
The FPGA version HD7 (introduced into production in February 2007) does correct this timing problem. In case you are concerned by this problem, please contact your local representative and ask for a new version of the FPGA (version HD7). This FPGA is mounted on the module (the version of the FPGA is indicated on a round sticker on the FPGA) and can be replaced easily.