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Question# 1. Is this a "drop in replacement"?
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Altera parts have Package Migration Schemes between family members for the same package. This is not a "Drop" in replacement however. They sometimes have different power/gnd and NC differences between family members. That if you design your board to accept all family/package combinations you can make it migratable. The quickest way to check is to use the device migration feature. If it gives you errors, then at a minimum a board rework will be required. But to verify, go through the device pinouts side by side to make sure. Sometimes they may have pins you don't use defined as "VCC_IO" pins etc that may not pop up in the migration messages.
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Question# 2 Do I need to change the program to let it know that it is going into the EP3C10?
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At the very minimum you need to recompile for the target device. Most likely you are going to the bigger device because of fit issues anyway. If you already have product in the field. You need to very carefully know what FPGA is on the board so you load the correct bitfile.
Pete
Honored Contributor
