Since it's all digital you can't. But of course it's not the whole truth. Actually you can, using PWM and an LP-filter. Sure, the LP-filter will now dictate how fast you can change that output. Note that you can't increase the output voltage this way, only lower it.Hi all,
does anyone have any idea how i can implement a variable voltage output on the i/o pins? like say i want 2.5V or 3.5V.
Actually, there's more truth to that than you give credit. If you want to go down to transistor level modeling, you can actually model different supply values in verilog using signal 'strength's, which I am told can be synthesized to different supply voltages. However, this will be very tool and target dependent, and i don't think it is synthesizable on fpgas. If it is, i'd guess they're just assigned logical values.But of course it's not the whole truth. Actually you can,
by Jake Hertz
by Duane Benson
by Duane Benson