MPC5xxx中的主题 EXTCLK MPC561

EXTCLK MPC561

christophe_c — Thu, 20 Jul 2023 07:29:54 GMT

Hello,

I use a MPC561 with a problem of startup.

The EXTCLK and JCOMP signals are not connected.

Can these unconnected signals generate a problem of startup ?

Thank you in advanced

Best regards

Christophe

lukaszadrapa — Thu, 20 Jul 2023 13:02:22 GMT

there should be no problem with unconnected JCOMP. It is internally pulled down which enables BDM/Nexus pins instead of JTAG.

But unconnected EXTCLK could be an issue - if it is not used, it must be tied to GND.

Regards,

Lukas