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Altera_Forum's avatar
Altera_Forum
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12 years ago

Multi Device AS configuration scheme

Dear Sir, In the multi-device AS configuration in which devices receive the same data with multiple .sof, nCONFIG, nSTATUS and CONF_DONE pins of Master and slave FPGA’s are shorte...
Altera_Forum's avatar
Altera_Forum
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11 years ago

You can't boot two FPGAs in parallel in AS mode. Which FPGA's DCLK would you use as the source? The FPGAs are not going to be able to synchronise their configuration clocks such that this could work. Using the clock from one FPGA to clock data into the other FPGA is not going to result in the correct data/clock alignment for the second FPGA.

If you want to boot them in parallel you'd have to use a passive configuration mode (e.g. passive serial). However, you wouldn't be able to rely on Cyclone V's 'built in' remote upgrade facility. You'd have to support this in another way.

Cheers,

Alex