In some applications, we need to shift frequencies to avoid interference from certain frequencies, such as shifting to avoid Wi-Fi interference.
The document is a guide for shifting DDR3 frequency.
The document uses the iMX8M Nano DDR3 as an example, but the process is the same for the iMX8M mini, iMX8M Plus, LPDDR4, etc. The main issue is resolving the DDR pll configuration.
Before reading this article, we assume you are already familiar with using the DDR stress tool and DDR config rpa, or the DDR tool of the config tools.
pll_to_table_entry_rates.py can help you to find the settings.
