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Altera_Forum's avatar
Altera_Forum
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19 years ago

distinction between EPCS and FLASH

I want to know distinction between EPCS and FLASH.IF I use only FLASH memory in my custom CPU,is ok?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

The EPCS device is a serial flash. You can store your hardware, software , and whatever else you'd like to store in the EPCS device. The epcs_controller allows you to boot from the EPCS device, and the nice Nios II HAL flash abstraction layer allows you to read or write to the EPCS device, as well.

The other type of flash, that is directly supported by the Nios II, is the CFI (Common Flash Interface) variety.

You can read more about these different types of flash in the flash user's guide and the Nios II Software User's Guide.

Cheers,

- slacker