https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214407#M18566 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>&nbsp;</P><P>You will need to operate the 'QE32 device from a 3.3 volt supply, and the LCD display from 5.0 volts.&nbsp; However, assuming that the HD44780 is permanently set to write mode (as is often the case), the 3.3 volt swing from the MCU output pins should still be compatible with the switching threshold of the data and control inputs to the display.&nbsp; Check this is true for the display you are using.</P><P>&nbsp;</P><P>Regards,</P><P>Mac</P><P>&nbsp;</P></BODY></HTML> Mon, 13 Jun 2011 18:37:43 GMT bigmac 2011-06-13T18:37:43Z https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214405#M18564 <HTML><HEAD></HEAD><BODY><P>Hi, I want to know what is the maximum voltage for mc9s08qe32 for io digital, because I want to connect a lcd hd44780 and I dont know if could support the 5v,best regards</P></BODY></HTML> Mon, 13 Jun 2011 13:32:30 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214405#M18564 thinkchip 2011-06-13T13:32:30Z https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214406#M18565 <HTML><HEAD></HEAD><BODY><P>Absolute Maximum Ratings</P><P>Supply voltage VDD -0.3 to +3.8V</P><P>Digital input voltage VIN -0.3 to VDD+0.3</P></BODY></HTML> Mon, 13 Jun 2011 14:28:37 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214406#M18565 Mickey 2011-06-13T14:28:37Z https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214407#M18566 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>&nbsp;</P><P>You will need to operate the 'QE32 device from a 3.3 volt supply, and the LCD display from 5.0 volts.&nbsp; However, assuming that the HD44780 is permanently set to write mode (as is often the case), the 3.3 volt swing from the MCU output pins should still be compatible with the switching threshold of the data and control inputs to the display.&nbsp; Check this is true for the display you are using.</P><P>&nbsp;</P><P>Regards,</P><P>Mac</P><P>&nbsp;</P></BODY></HTML> Mon, 13 Jun 2011 18:37:43 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214407#M18566 bigmac 2011-06-13T18:37:43Z https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214408#M18567 <HTML><HEAD></HEAD><BODY><P>What bigmac said is true but there are a few LCDs that use&nbsp; 3.3 V</P><P>such as <A href="http://www.sparkfun.com/products/9054" rel="nofollow" target="_blank">http://www.sparkfun.com/products/9054</A></P><P>&nbsp;</P><P>&nbsp;</P><P>Roger</P></BODY></HTML> Mon, 13 Jun 2011 22:42:15 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/maximun-voltage-i-o-digital-for-qe32/m-p/214408#M18567 RogerSchaefer 2011-06-13T22:42:15Z