https://community.nxp.com/t5/MPC5xxx/MPC5748G-PORST-Pin/m-p/432389#M1097 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>when using the internal core voltage regulator and external ballast transistor, it is recommended to pull the PORST pin to VDD_HV_A via 10k resistor.</P><P></P><P>Best Regards,</P><P>Lukas</P></BODY></HTML> Tue, 08 Sep 2015 04:32:15 GMT lukaszadrapa 2015-09-08T04:32:15Z https://community.nxp.com/t5/MPC5xxx/MPC5748G-PORST-Pin/m-p/432388#M1096 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>with the help of the reference manual I found out what to do with the Porst Pin when using an external 1.25V supply. But what to do with the PORST Pin when using the NPN ballast transistor for providing the 1.25V?</P><P>Connect PORST to the 1.25V? Connect PORST to VDD_HV? Leave PORST floating?</P><P>(I'm using the MPC5748G)</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you in advance,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Michael</P></BODY></HTML> Mon, 07 Sep 2015 19:25:19 GMT https://community.nxp.com/t5/MPC5xxx/MPC5748G-PORST-Pin/m-p/432388#M1096 michaelm 2015-09-07T19:25:19Z https://community.nxp.com/t5/MPC5xxx/MPC5748G-PORST-Pin/m-p/432389#M1097 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>when using the internal core voltage regulator and external ballast transistor, it is recommended to pull the PORST pin to VDD_HV_A via 10k resistor.</P><P></P><P>Best Regards,</P><P>Lukas</P></BODY></HTML> Tue, 08 Sep 2015 04:32:15 GMT https://community.nxp.com/t5/MPC5xxx/MPC5748G-PORST-Pin/m-p/432389#M1097 lukaszadrapa 2015-09-08T04:32:15Z