Hello,
I have some issue with the supply of wheel speed sensors (WSS), on WSPx I don't measure VBAT (12V).
For a first application I don't use the watchdog, I disable this module by the bit WD_EN.
I used a active sensor, so WSStype bit is set to 1. To supply my 2 WSS, I activate WSP1 & WSP2 bits of the register 0x1B.
I validate the frame structure with 10µs CSNtimeout, the microcontroller output of SPI communication seems correct.
However when I measure the pins WSP1 & WSP2 I don't find VBAT value.
In attached powerpoint file, I explain this problem with oscilloscope screen shot to illustrate SPI frame & WSPx supply.
Thank you in advance for your support.
Best regards,
Samy AKOURTAM
