I am using a MK20FN1M0VLQ12 device.
I have the following questions:
In K20 Sub-Family Datasheet「Document Number K20P144M120SF3 Rev 5, 10/2013」
Q1.[6.3.1 MCG specifications Table 15. MCG specifications]
"Δfdco_t" is "typ ±4.5%fdco".
I understand that this spec is when using the (slow clock) internal reference.
Do I understand correctly?
Q2.about "Δfdco_t".
I want to use MCG in FLL mode using External clock from RTC OSC(32.768kHz ±20ppm).
Target DCO output frequency is 47.97MHz.
Other setting is below.
DMX32:1
DRST_DRS:01
In that case,
Do you tell me the spec of "Δfdco_t" ?
Thank you and Best regards.
Solved! Go to Solution.
Hello Okubo:
About your questions:
Q1: Your understanding is correct, the tests were made with the slow internal reference clock (32 kHz)
Q2: I assume that these tests are not made due to all the external factors that can affect the accuracy. So there is no information about this. However, I think the tolerance should be similar to Δfdco_t, as you would use the same frequency with the RTC (32 kHz).
Hope my reply is useful.
Regards!
Jorge Gonzalez
Hello Okubo:
About your questions:
Q1: Your understanding is correct, the tests were made with the slow internal reference clock (32 kHz)
Q2: I assume that these tests are not made due to all the external factors that can affect the accuracy. So there is no information about this. However, I think the tolerance should be similar to Δfdco_t, as you would use the same frequency with the RTC (32 kHz).
Hope my reply is useful.
Regards!
Jorge Gonzalez