How to deal with the ENGCLK PIN when it's not be used in MPC5775 hardware design

[ethan-li]

Hi,

  Is there any considerations about how to deal with the ENGCLK PIN, when it's not used in MPC5775E hardware design?

   Can it be left floating? Or be Pull-down through a resistor? If pull-down through a resistor,  what are the requirements of the resistor?

    Appreciate your help!

[RBog]

@davidtosenovjan , you recommend to set OBE flag low for PCR214 but does NXP MCAL actually allow to do it? 

We use DaVinci configurator by Vector based on MPC5777C_MCAL v4_3_RTM_1_0_2_0 MCAL and we can't configure OBE flag to be low.

Kind regards,

Roman

[davidtosenovjan]

Hi, as it is output only pin I would recommend you to let it floating and disable output buffer i.e. clear SIU_PCR214(OBE) in order to reduce EMI.