Forum Discussion

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

Stratix IV Device IO standard

We are using Startix IV, in DE4 FPGA board. Currently the STRATIX_DEVICE_IO_STANDARD is set as 2.5V. I want to know whether 3.3V is supported?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

--- Quote Start ---

We are using Startix IV, in DE4 FPGA board. Currently the STRATIX_DEVICE_IO_STANDARD is set as 2.5V. I want to know whether 3.3V is supported?

--- Quote End ---

You need to review the schematic for the board. This setting is the default voltage for pins that you do not specify, however, that is not really sufficient since the PCB defines the I/O voltages.

I've uploaded my constraints.tcl file (renamed to constraints_tcl.txt since the Altera uploader does not accept the tcl extension).

From this constraints file, you should be able to understand what the voltages allowed on each pin are.

Cheers,

Dave