PSI5

[alex_19_rcc]

Hi everyone,

I am trying to establish communication between the L9663 and an airbag sensor using PSI5. However, the behavior I observe on the oscilloscope is shown in the picture, with ramps instead of clear pulses. Since PSI5 uses the same wire to send both data and power, I split the line into two at the beginning of my setup. Whenever I disconnect the “VDD line,” the signal is transmitted correctly (no ramps). What could be the problem? Has anyone encountered a similar issue? Additionally, I should be able to see the sensor’s response on the DOUT line, but I don’t see anything (DOUT is set to 0 as direct data output by default).

Thank you in advance.