Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

USB fT245 max II

HI, im working with Max II . it has a CPLD and an device usb the FT245, do anybody have worked with that?, i did an example with labview and VHDL, i can communicate with pc, but the signal TXE doesnt...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Here's a scope trace of WR and TXE# probe at the pins of the FT245BM on the MAX II PCI development kit. The scope probe was longer than I would normally use; it was clipped to a ground connection in the prototype area. The small amount of ringing seen in the traces is due to the probe ground.

The signal quality of this trace is fine, there is no ringing due to the board layout.

Cheers,

Dave