topic QG8 on USBSPYDER Problem in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/QG8-on-USBSPYDER-Problem/m-p/174484#M12053 <HTML><HEAD></HEAD><BODY><P>Hello All,</P><P>&nbsp;</P><P>I am working on&nbsp; a Universal infrared receiver using QG8.<BR /><BR />As VCC i have dropped 5V to 3.6V using 2 diodes in series. The output pin PTAD1 drives&nbsp; a relay through a transistor.<BR /><BR />The transistor turns on when the code is run through USBSPYDER and subsequently turns OFF also, as intended. But when i connect my circuit to independent 3.6V(which i generate from 5V), the transistor turns ON but it never responds after that. Is this something related to RESET? i have disabled COP.<BR /><BR />Kindly help me as always.<BR /><BR />Thanks and Regards,<BR />Ameya</P></BODY></HTML> Wed, 22 Apr 2009 22:05:14 GMT Amey 2009-04-22T22:05:14Z QG8 on USBSPYDER Problem https://community.nxp.com/t5/8-bit-Microcontrollers/QG8-on-USBSPYDER-Problem/m-p/174484#M12053 <HTML><HEAD></HEAD><BODY><P>Hello All,</P><P>&nbsp;</P><P>I am working on&nbsp; a Universal infrared receiver using QG8.<BR /><BR />As VCC i have dropped 5V to 3.6V using 2 diodes in series. The output pin PTAD1 drives&nbsp; a relay through a transistor.<BR /><BR />The transistor turns on when the code is run through USBSPYDER and subsequently turns OFF also, as intended. But when i connect my circuit to independent 3.6V(which i generate from 5V), the transistor turns ON but it never responds after that. Is this something related to RESET? i have disabled COP.<BR /><BR />Kindly help me as always.<BR /><BR />Thanks and Regards,<BR />Ameya</P></BODY></HTML> Wed, 22 Apr 2009 22:05:14 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/QG8-on-USBSPYDER-Problem/m-p/174484#M12053 Amey 2009-04-22T22:05:14Z Re: QG8 on USBSPYDER Problem https://community.nxp.com/t5/8-bit-Microcontrollers/QG8-on-USBSPYDER-Problem/m-p/174485#M12054 <HTML><HEAD></HEAD><BODY><P>You should try to use a voltage regulator instead of series diodes (e.g. fixed 3.6 volt output, low drop, like LP2981).</P><P>Please write again, if problem persists.</P><P>Klaus</P><P>&nbsp;</P></BODY></HTML> Thu, 07 May 2009 22:21:09 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/QG8-on-USBSPYDER-Problem/m-p/174485#M12054 Problem99 2009-05-07T22:21:09Z