Hello, Community.
Is there a way to change the serial clock frequency in the QSPI configuration parameters after system startup?
I want to set the serial clock frequency in the QSPI configuration parameter to 55MHz, and change it to 99MHz after the system boots.
I searched all QuadSPIx_xxx registers, but could not find any setting items for the serial clock frequency.
How do I change the serial clock frequency?
Best Regards,
Takashi Kojima
Solved! Go to Solution.
Hi Takashi
qspi clock generation is described in Figure 10-16. Flash Clock Diagram,
where ser_clk_4x is the serial clock root from CCM.
i.MX 7Dual Applications Processor Reference Manual
So it can be changed using CCM Table 5-11. Clock Root Table (QSPI_CLK_ROOT),
During boot with Table 6-50. QuadSPI configuration parameters, parameter "Serial Clock
Frequency".
Best regards
igor
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Hi, igor,
Thank you for your reply!
I understand that you can change serial clock frequency using Clock Root Table (QSPI_CLK_ROOT).
Best regards,
Takashi Kojima
Hi Takashi
qspi clock generation is described in Figure 10-16. Flash Clock Diagram,
where ser_clk_4x is the serial clock root from CCM.
i.MX 7Dual Applications Processor Reference Manual
So it can be changed using CCM Table 5-11. Clock Root Table (QSPI_CLK_ROOT),
During boot with Table 6-50. QuadSPI configuration parameters, parameter "Serial Clock
Frequency".
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
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