John Syn <[email protected]> wrote: > >"Steady state max. voltage at all I/O pins" > >"-0.5 volts to IO supply voltage +0.3 volts" > > > >So, even with power off, some voltage *is* allowed and in fact it > >should be fairly easy to keep the voltage within these limits using > >Schottky diodes for clamping. > Schottky diodes aren¹t going to clamp the voltage to this range. Simply > use the 3V3 output from the BBB to enable the supply to your board. > ???
How would using the 3.3v IO output from the BBB be any different from clamping the input voltages to the 3.3v IO output from the BBB? It's the same thing surely? One Schottky diode prevents the voltage going below 0.3 volts (it will conduct such that the voltage doesn't go below 0.2 volts), another can clamp the input to prevent it going above the 1.8 volt ADC supply voltage. -- Chris Green · -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
