Generate a Clock Signal at a Pin

[User18369]

Hello,

how to generate a 16Mhz Clock output signal at a Pin on an XMC4800?
Thanks

Best regards
Florian

[User18369]

Has nobody got a hint or an example?

[Vasanth]

Hi Florian,

If you are using Dave Apps,

In CLOCK_XMC4 APP, Clock selection tab has an option to enable clock source.


The clock source and divider can be selected in such a way that you obtain 16MHz.
The output can be driven to P0[8] or P1[15].

You can checkout following APIs too.

/* External output source clock */
XMC_SCU_CLOCK_SetExternalOutputClockSource();
/* External clock divider setting */
XMC_SCU_CLOCK_SetExternalOutputClockDivider();
/* External clock output pin setting */
XMC_GPIO_Init((XMC_GPIO_PORT_t *)PORT1_BASE, 15U, &CLOCK_XMC4_0_extclk_config);

Best Regards,
Vasanth

[User18369]

Hi Vasanth,

thank you. If check the box of External Clock (fEXT) I got an error:



What can be the problem ?

[Vasanth]

Hi,

Could you make sure that both pins P0[8] and P1[15] are not already placed and in your design ?

Best Regards,
Vasanth

[User18369]

Vasanth wrote:
Hi,

Could you make sure that both pins P0[8] and P1[15] are not already placed and in your design ?

Best Regards,
Vasanth

Thank you for that tip !!!! It solved the Problem !!! I put a DIGITAL OUTPUT PIN on 0.8