Thanks everyone for the help and information. I also discovered that if you want to increase the drive strength for any IO standard for the FPGA IO pins it is possible through the Assignment Editor in Quartus II under Logic Options by setting current_strength_new to <drive strength>
Thanks again for all the information. Nirali -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bahn William L Civ USAFA/DFCS Sent: Tuesday, October 02, 2007 5:15 PM To: discuss-gnuradio@gnu.org Subject: RE: [Discuss-gnuradio] Default FPGA I/O standard > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Brian Padalino > Sent: Monday, October 01, 2007 5:53 PM > To: Matt Ettus > Cc: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] Default FPGA I/O standard > > On 10/1/07, Matt Ettus <[EMAIL PROTECTED]> wrote: > > I think 3.3V LVTTL and LVCMOS are really the same. > > > > Matt > > According to this: > > http://www.interfacebus.com/voltage_LV_threshold.html > > They are, indeed, basically the same. > > Brian They're the same only different. For most purposes, the differences don't matter too much. The biggest difference is in the output drive capability. LVTTL outputs are required to be able to source/sink 2mA while remaining compliant while LVCMOS outputs are only required to source/sink 100uA. For those interested in the "official" word, refer to the actual JEDEC standard: http://www.jedec.org/download/search/jesd8c.pdf _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
