Hi Yashi, On 24.11.22 14:13, Yasushi SHOJI wrote:
I've checked with one of my colleagues and he told me I measured it wrong.
Ok.
Here is a correction. You can find the schematic of the analyzer in its user's guide https://www.microchip.com/en-us/development-tool/APGDT002 or directly at https://ww1.microchip.com/downloads/aemDocuments/documents/APG/ProductDocuments/UserGuides/CAN-Bus-Analyzer-Users-Guide-DS50001848C.pdf The schematics is at page 11. Basically the "termination" controls the CAN_RES signal. When it's low, R24 and R25 are connected to the bus. They are 56 Ohms.
Ah, that means 2 x 56 Ohms => 112 Ohms (nearly 120)
With my patch, "termination 120" drives CAN_RES low and the resistors are active, and "termination 0" drives it high.
Thanks for the clarification! Best regards, Oliver
