topic Re: RTC off when no external oscillator in Kinetis Software Development Kit https://community.nxp.com/t5/Kinetis-Software-Development-Kit/RTC-off-when-no-external-oscillator/m-p/595962#M6043 <HTML><HEAD></HEAD><BODY><P>Hello Ciao,</P><P></P><P>Unfortunately, there is not such feature for RTC in K20, there is only a clock monitor that allows user to detect when RTC CLKOUT signal is lost (MCG_C8[CME1] bit), however, it does not apply when MCU is in low power modes or when MCU is not powered up. In other words, It can help you to detect if RTC CLK OUT signal is lost only when MCU is fully powered.</P><P></P><P>Regards,</P><P>Isaac</P></BODY></HTML> Mon, 25 Jul 2016 22:13:12 GMT isaacavila 2016-07-25T22:13:12Z RTC off when no external oscillator https://community.nxp.com/t5/Kinetis-Software-Development-Kit/RTC-off-when-no-external-oscillator/m-p/595961#M6042 <HTML><HEAD></HEAD><BODY><P>Good Morning.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I am running RTC MK20DX256VLL10, however to turn off the chip and remove the oscillator 32Khz my RTC stops working. Its detect if the crystal was removed by the User when the chip is not powered (connected only with the RTC battery)? </P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you</P></BODY></HTML> Thu, 21 Jul 2016 14:13:14 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/RTC-off-when-no-external-oscillator/m-p/595961#M6042 carrielbr 2016-07-21T14:13:14Z Re: RTC off when no external oscillator https://community.nxp.com/t5/Kinetis-Software-Development-Kit/RTC-off-when-no-external-oscillator/m-p/595962#M6043 <HTML><HEAD></HEAD><BODY><P>Hello Ciao,</P><P></P><P>Unfortunately, there is not such feature for RTC in K20, there is only a clock monitor that allows user to detect when RTC CLKOUT signal is lost (MCG_C8[CME1] bit), however, it does not apply when MCU is in low power modes or when MCU is not powered up. In other words, It can help you to detect if RTC CLK OUT signal is lost only when MCU is fully powered.</P><P></P><P>Regards,</P><P>Isaac</P></BODY></HTML> Mon, 25 Jul 2016 22:13:12 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/RTC-off-when-no-external-oscillator/m-p/595962#M6043 isaacavila 2016-07-25T22:13:12Z