Forum Discussion

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

configuring multiple fpga's with multiple bitstreams via JTAG connection.

Hello People, I have successfully developped a special board with six fpga's (EP3C25) each fpga has its own EPCS16 configuration memory and they are programmed seperately on their own JTAG sock...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

If you want to use identical configuration bitstreams for all FPGAs, it's another strong reason not to configure them in a JTAG chain, because it requires the configuration to be performed sequential. PS or PP can be basically write to all devices in parallel, if the hardware is prepared for.

As Dave explained, the main disadvantage of JTAG configuaration is the incomplete support by Altera. If you want to implement standalone configuration in a uC, you have to figure out a lot of details yourself. I also didn't exactly understand, why you're preferring JTAG over PP or PS.