Hi Henry, Thanks for that. As it happens I was also wondering why LVCMOS15 outputs (as in the ucf file) managed to be 3V -- should have put two and two together I guess.
Thanks Jack On 28 August 2010 17:40, Henry Chen <[email protected]> wrote: > Hi Jack, > > The GPIOs on the ROACH are spread across different I/O banks, so > they are all at different voltages. To make them all a uniform 3.3V, > they go through unidirectional level translators; the gpiox_oe_n > signals control the drive directions of these translators. > > Cheers, > Henry > > > On 8/27/2010 5:50 PM, Jack Hickish wrote: > >> Hi all, >> >> I've been playing around with the GPIO on a ROACH, and just to ease my >> curiosity, can anyone tell me what the pins that are driven by the >> gpiox_oe_n blocks actually *do*? >> >> Anyone with an answer will surely save me many sleepless nights of idle >> wondering... >> >> Cheers, >> >> Jack >> >
