Part Number: TMS320F28335 Tool/software: I have developed a Custom PCB based on the F28335PTPS microcontroller and am using the TI XDS 110 Debug Probe for JTAG debugging. While generating waveforms at a specific frequency, I’ve observed that the output frequency on the hardware is approximately one-third of the expected value. However, when simulating the same setup in Simulink, the output frequency is correct. Key details: Microcontroller: TMS320F28335PTPS Debug Probe: TI XDS 110 (JTAG) Crystal: 30 MHz Upon further investigation, I noticed that the crystal frequency, as observed on the DSO, fluctuates rapidly between Hz and MHz instead of maintaining a stable value. This irregularity leads me to suspect there might be an issue related to the clock configuration or the crystal itself. I’ve attached the schematics for your reference. I would greatly appreciate it if you could provide insights into potential causes and suggestions to resolve this issue. Looking forward to your expert guidance.
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