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Altera_Forum
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15 years ago

Cyclone III configuration using M25P16 flash

Hi all, I've recently switched config devices from an ST M25P40 to an ST M25P16 flash for a design using a Cyclone III EP3C10 (in active serial mode). I've wired up the flash as indicated in t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

OK, fixed it - I needed to add a series termination resistor to the DCLK line. Ideally this would be close to the FPGA, but since that is inaccessible on my board I put it at the receiving end - the config flash clock pin - and the problem is fixed. I guess this larger flash has a lower pin capacitance than the devices I was using previously.