Other Parts Discussed in Thread: DS90UB913Q-Q1, DS90UB914Q-Q1
Tool/software:
Message:
Hello,
I'm currently working with the DS90UB913 serializer in a project, and I'm experiencing an issue where the PCLK drops down to 50/25 MHz after a few seconds of operation. Here are the details of my setup and the problem:
Setup:
- Serializer: DS90UB913Q-Q1
- Deserializer: DS90UB914Q-Q1
- Input Signal: parallel 10 bit raw data
- Configuration: external FSIN , working at a clock of 84 Mhz
Problem Description:
- Initially, the PCLK operates at the expected frequency.
- After a few seconds, the PCLK drops to 50/25 MHz without any apparent reason.
- The issue persists even after resetting the device and reconfiguring the settings.
- When sensor is flooded with light, the clock returns to 84 MHz, when light turned off drops to 25/50 MHz
What I've Tried:
- Verified the power supply stability and ensured it is within the specified range.
- Checked the input signal quality for noise and stability.
- Ensured the mode select pins are configured correctly.
- Reviewed the initialization sequence to ensure it matches the recommended procedure.
- Monitored the temperature to ensure the device is operating within the specified range.
- Checked for any fault flags or error messages in the status registers.
Additional Information:
- When working with internally generated Test patterns there sone that stay stable and sone that cause a clock drop.
Stable example of data: Non stable example of data
