EPCS selection for Cyclone V

Read the handbook, and find the number of bits in the configuration file. That determines your flash size (without compression). From that you can select a configuration flash.

The minimum physical package size depends on whether you use Altera's "standard" devices, i.e., SOIC8 or SOIC16, or you use a compatible device. For example, the EPCS devices are re-branded Micron (previously Numonyx) parts; if you read their device identification (opcode 9Fh), the details read back are those of the Micron parts.

http://www.micron.com/products/nor-flash/serial-nor-flash

If you click on the M25P tab, these are the "classic" SPI flash devices. If you click on the N25Q tab, these are the EPCQ Quad-SPI flash.

Spansion S25FL devices can also be used

http://www.spansion.com/products/serial-flash/pages/spansion%20fl.aspx

If you click on the technical documents tab and scroll down you will find this app note

http://www.spansion.com/support/application%20notes/configuring_altera_fpgas_via_spi_flash_an.pdf

If you look at the data sheets for these devices, you will find many more packaging options.

Cheers,

Dave