https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-configure-Reset-Pin-as-GPIO-in-MC9S08PA4-device/m-p/348928#M21107 <HTML><HEAD></HEAD><BODY><P>Hello Ajay, </P><P></P><P style="text-align: justify;">According to the S08PA Reference Manual, the PTA4 pin contains an internal pullup resistor if BKGD function is enabled, and this function is enabled by Reset.</P><P style="text-align: justify;">In this case I recommend to disable the BKGD function on <STRONG>SOPT1</STRONG> register (bit <STRONG>BKGDPE</STRONG>).</P><P></P><P style="text-align: justify;">Regarding the PTA5 pin, that shares the pin functionality with the RESET, I also recommend to clear the <STRONG>RSTPE</STRONG> bit from the <STRONG>SOPT1</STRONG> register in order to make the pin function as a GPIO.</P><P></P><P style="text-align: justify;">Hope this information will be useful for you.</P><P style="text-align: justify;">Have a great day. :smileyhappy:</P><P></P><P>Best Regards,</P><P style="text-align: justify;">David Diaz.</P></BODY></HTML> Tue, 17 Mar 2015 17:03:06 GMT david_diaz 2015-03-17T17:03:06Z https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-configure-Reset-Pin-as-GPIO-in-MC9S08PA4-device/m-p/348927#M21106 <HTML><HEAD></HEAD><BODY><P>Hi All,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I am using MC9S08PA4VTG in which pin PTA5_FTM1CH0_IRQ_RESET as input and PTA4_ACMPO_BKGD_MS as output. </P><P>But at the startup of my program the control halts until we manually Pullup and pulldown PTA5_FTM1CH0_IRQ_RESET pin and then our program starts.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Could some one also faces the same issue, and how to over come this issue??</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thanks,</P><P>Ajay</P></BODY></HTML> Mon, 02 Mar 2015 10:10:15 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-configure-Reset-Pin-as-GPIO-in-MC9S08PA4-device/m-p/348927#M21106 ajaybharti 2015-03-02T10:10:15Z https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-configure-Reset-Pin-as-GPIO-in-MC9S08PA4-device/m-p/348928#M21107 <HTML><HEAD></HEAD><BODY><P>Hello Ajay, </P><P></P><P style="text-align: justify;">According to the S08PA Reference Manual, the PTA4 pin contains an internal pullup resistor if BKGD function is enabled, and this function is enabled by Reset.</P><P style="text-align: justify;">In this case I recommend to disable the BKGD function on <STRONG>SOPT1</STRONG> register (bit <STRONG>BKGDPE</STRONG>).</P><P></P><P style="text-align: justify;">Regarding the PTA5 pin, that shares the pin functionality with the RESET, I also recommend to clear the <STRONG>RSTPE</STRONG> bit from the <STRONG>SOPT1</STRONG> register in order to make the pin function as a GPIO.</P><P></P><P style="text-align: justify;">Hope this information will be useful for you.</P><P style="text-align: justify;">Have a great day. :smileyhappy:</P><P></P><P>Best Regards,</P><P style="text-align: justify;">David Diaz.</P></BODY></HTML> Tue, 17 Mar 2015 17:03:06 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/How-to-configure-Reset-Pin-as-GPIO-in-MC9S08PA4-device/m-p/348928#M21107 david_diaz 2015-03-17T17:03:06Z