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Altera_Forum
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7 years ago

migration from EPCQ to EPCQ-A

Hi, on a custom board we have successfully used an altera Cyclone V (5CEBA2) with an EPCQ32 (ASx4). Now we had to migrate from the EPCQ32 to the EPCQ32A. We used Quartus Prime Lite 17.1.0 a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Adding 33 Ohm 0805 resistors in series to each data line (between the flash pins and the corresponding pads on the PCB) solved our problem with the EPCQ32A.

On the same board the EPCQ32 works without those resistors.

Thus, they are clearly not equivalent regarding the PCB design. The EPCQ-A devices are less forgiving.