1211623_en-US

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

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!

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

@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

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

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.