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  1. L

    Data travelling on MB I2C bus: is this what HWinfo uses?

    :( as I feared and imagined. I feel for the developers of HWiNFO who had to reverse engineer this stuff! Thanks anyway. Really appreciated!
  2. L

    Data travelling on MB I2C bus: is this what HWinfo uses?

    Yep, I've been designing electronics for several years and I integrated a variety of I2C devices in my designs. I've never had to deal with the hardware of an ATX motherboard though so, if i were to connect an oscilloscope to the DATA and CLK lines of a M.2 slot, I imagine it would be very very...
  3. L

    Data travelling on MB I2C bus: is this what HWinfo uses?

    Thanks, Martin. I imagine there's quite a lot of traffic on that bus and the motherboard manufacturers do not go out of their way to make it understandable. Does HWiNFO need the physical I2C addresses of the devices on the bus or is there a different interface (API) at application level? Can you...
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    Data travelling on MB I2C bus: is this what HWinfo uses?

    Hi. Many (most) motherboards nowadays feature a M.2 slot with E-key or A+E-Key. The I2C (or SMB) bus of the motherboard is exposed in the pinout of such slot: CLK on pin 60 and DATA on pin58 (and there's an 'ALERT #' signal on pin 62 but normally there isn't such a signal in an I2C bus). Those...
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