Kinetis Software Development KitのトピックRe: External oscillator cannot start in MKL81 https://community.nxp.com/t5/Kinetis-Software-Development-Kit/External-oscillator-cannot-start-in-MKL81/m-p/622599#M6499 <HTML><HEAD></HEAD><BODY><P>Found out the problem. One of the capacitor shorted to ground which causes EXTAL0 pin stays low all the time.</P></BODY></HTML> Thu, 19 Jan 2017 00:41:32 GMT daweiy 2017-01-19T00:41:32Z External oscillator cannot start in MKL81 https://community.nxp.com/t5/Kinetis-Software-Development-Kit/External-oscillator-cannot-start-in-MKL81/m-p/622598#M6498 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I have a problem to start external oscillator. The problem is pin XTAL0 goes to high but toggling, so EXTAL0 always stays low.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>&nbsp;The hardware design is followed Freedom-KL82 reference design. The external Osc is a 12MHz one. I am using SDK's GPIO example IAR project for&nbsp;frdmkl81z board. In BOARD_ClockInit() function, XTAL0 and EXTAL0 are both configured to alternate 0 mode. I am using default clock configure RUN table which enables OSCERCLK.&nbsp;</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>When I run the code, code stuck in this line, "while(!CLOCK_HAL_IsOsc0Stable(base)){}“. When I put a probe on Oscillator pin 1, I can see PIN XTAL0 stays in HIGH instead of toggling. I think this may cause external Oscillator no output to microprocessor.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Does anyone had this problem before?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Dawei</P></BODY></HTML> Tue, 17 Jan 2017 01:28:48 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/External-oscillator-cannot-start-in-MKL81/m-p/622598#M6498 daweiy 2017-01-17T01:28:48Z Re: External oscillator cannot start in MKL81 https://community.nxp.com/t5/Kinetis-Software-Development-Kit/External-oscillator-cannot-start-in-MKL81/m-p/622599#M6499 <HTML><HEAD></HEAD><BODY><P>Found out the problem. One of the capacitor shorted to ground which causes EXTAL0 pin stays low all the time.</P></BODY></HTML> Thu, 19 Jan 2017 00:41:32 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/External-oscillator-cannot-start-in-MKL81/m-p/622599#M6499 daweiy 2017-01-19T00:41:32Z