1 Reply Latest reply on May 26, 2019 10:35 PM by SampathS_11

    PSoC1 USB D+  pullup

    user_2878467

      I'm using the CY8C24894-24LTXI on a board mainly as a simple USB interface to the outside world (which can be both windows or embedded hosts). The PSoC1 is always a device. I recently have enumeration problems that pop up. In looking closer at the PSoC1 side, the D+ pullup measures much higher than the spec 1.5K, closer to 2k. This appears to add to the startup issues. There's not much in the Developer's USB wizard that I can see would bias the D+ pullup value.

       

      Has anyone seen this issue, or any tips on what we might be doing on startup that would effect the D+ pullup? This is not a new board (like over 10 years), so nothing has changed in years.

       

      Thanks - Steve