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The Melexis MLX90372 datasheet says that it can output either SENT protocol or PWM. I do not see anywhere in the datasheet how to put it into "PWM Mode" as they call it. Nor do I see how to configure the PWM frequency 100Hz-2kHz.

Does anyone know how to do this?

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  • \$\begingroup\$ Ah, let me skim the friendly datasheet. Page 45 - "Output config: protocol" tells you how to do ti. \$\endgroup\$
    – tlfong01
    Commented Aug 13, 2020 at 1:45
  • \$\begingroup\$ And what you want is PSF, no DIY. \$\endgroup\$
    – tlfong01
    Commented Aug 13, 2020 at 2:30
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    \$\begingroup\$ @tlfong01 Yes, I've seen section 12. I guess what isn't clear to me is, do I have to use SENT protocol to configure it? Seems silly to implement SENT just to configure PWM, might as well use SENT at that point. \$\endgroup\$
    – Aaron
    Commented Aug 13, 2020 at 2:37
  • \$\begingroup\$ Ah, I am just wildly guessing: (1) This device is for mass production manufacturers, ie, who produce perhaps one million cars per month. So they don't program or reprogram the device themselves. All PSF (Product Specific Functions) are decided before they place the huge quantity order. In other words, each device arrived is either SENT or PWM, and all the other PSFs are not changeable after they arrive. (2) SENT is a very misleading term. It mean what is "sent" by the device out to the CAN or MCU etc. In other words, it is unidirectional - output only. / to continue, ... \$\endgroup\$
    – tlfong01
    Commented Aug 13, 2020 at 2:52
  • \$\begingroup\$ Yes, their is the "input" pin, but I think you need to order one million pieces to ask for Melxis to tailor made something according to your specific spec. \$\endgroup\$
    – tlfong01
    Commented Aug 13, 2020 at 2:54

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It turns out these are programmed via a chip programmer, like an eeprom or micro-controller. Melexis make the PTC-04 for programming their chips.

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