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i.MX6S CLKO1 does not output 32kHz.

Question asked by Satoshi Shimoda on Mar 18, 2014
Latest reply on Mar 26, 2014 by Satoshi Shimoda

Hi community,


I have a question about i.MX6S CLKO.

I tried output 32kHz from CCM_CLKO1 with the following settings.

However, it does not output even though external 32kHz crystal oscillates certainly.





CCM Clock Output Source Register (CCM_CCOSR)

8 CLK_OUT_SEL : 0 CCM_CLKO1 output drives CCM_CLKO1 clock

7 CLKO1_EN : 1 CCM_CLKO1 enabled.

6-4 CLKO1_DIV : 000 divide by 1(default)

3-0 CLKO1_SEL : 1110 ckil_sync_clk_root




Is any additional setting needed to output 32kHz from CCM_CLKO1?

If no additional setting is needed, could you let me know what is considered as a possibility of a root cause?


For your information, 24MHz is output from CCM_CLKO2 with similar setting as above.



Best Regards,

Satoshi Shimoda