CY8C24794 usb trackpad chip firmware

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  • marce002
    Badcaps Veteran
    • May 2018
    • 316
    • Argentine
    #1

    CY8C24794 usb trackpad chip firmware

    Hello

    Here I have macbook a1502 with (13" macbook pro) working keyboard but not working trackpad... no water damage all is clean, track and pads are ok so i think problem is with CY8C24794 usb chip.. my question is , will a1297 DONOR BOARD WITH SAME CHIP be compatible if i use the CY8C24794 from the a1297 (17" i7 macbook pro)...

    Attached Files
    Last edited by marce002; 06-21-2022, 11:16 AM.
    Marcelo J
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14034
      • Canada
      #2
      Re: CY8C24794 usb trackpad chip firmware

      Very interesting observation.

      I think there is a very high chance that it will work - the pinout is the same between the PSOC devices. The PSOC is just a programmable 8051 or Cortex M0 / M0+, etc. micro with embedded fpga like fabric. The internal firmware defines the function and pinout.

      Give it a try and do update this thread. Fairly sure that it will work.
      Attached Files

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        • marce002
          Badcaps Veteran
          • May 2018
          • 316
          • Argentine
          #3
          Re: CY8C24794 usb trackpad chip firmware

          thanks mon2 to such fast answer, i ask because different some pins,, ej p4_1 and p4_3 NC one but reset and debug in the other
          Marcelo J

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14034
              • Canada
              #4
              Re: CY8C24794 usb trackpad chip firmware

              I don't think it will matter since you are not debugging the firmware. The developer will use the pin to debug their firmware code - to trace and monitor in the internal working registers, etc. of the microcontroller.

              The reset pin is likely still not an issue as the internal device will feature multiple resets including a power on reset. This reset is an additional and external reset.

              I would give it a try as the parts are so so so close to each other.

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