Don Latham wrote:
I'm just checking so's I don't destroy my USRP mboard. The I/O lines such as io_tx_13 etc. that are available on the flex 2400's seem to go straight to the Cyclone FPGA. If that's the case, are they set to LVCMOS or LVTTL? And, is the voltage used 3.3 V? I think I read the answer on the schematics, but I need to check! Thanks, All.
They go straight to the FPGA. They are 3.3V CMOS. Don't pull more than about 5mA.
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