Custom Teensy PCB Repeatedly Connects and Disconnects from PC

[ccaruso]

I have made a "Eval" board using MIMXRT1062DVJ6B, W25Q64JVXGIM TR, and IC_MKL02Z32_T4_QFN16 (bought from PJRC). I had to manually solder the W25 and MKL02, which I don't have a ton of experience with. When I plug the PCB into my computer, using Windows 11, it makes the connection and disconnection sound every 2 seconds. I am not seeing anything on Arduino or Device Manager. When I press the program button, the MKL02 LED starts to repeatedly turn on for 1 second, then off for 1 second, all while the the sound cues from the computer continue.

I had 2 PCBs made, and the second is doing the same sound thing. However, the MKL02 LED is blinking 2 times. This could definitely be because of my soldering, as I am aware of the Blink Codes.

One thing that I can think of is I did not connect USB_OTG2_VBUS (P6), as I am not using the second USB lines. I hope that is not the problem.

Here is my schematic (I have some headers that I am using jumpers on to try different methods of powering it, right now I have it configured like the Teensy 4.1):

 

[MarkT]

Can you post at a readable resolution, preferrably on a white background? One reason for disconnecting is over-current - have you measured the current draw of your board?

 

[ccaruso]

Can you post at a readable resolution, preferrably on a white background? One reason for disconnecting is over-current - have you measured the current draw of your board?

Thanks for the reply! The current at the USB (5V) is only about 35 mA.

Here's the schematics again:

 

[ccaruso]

UPDATE: I realized that I somehow got the wrong crystal frequency. I have ordered the right one and will give another update if that fixes the problem or not.