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Legacy EPCS Flash Controller

Honored Contributor II



I am using quartus 14.1. I have a NIOS based system having a legacy EPCS controller interfaced to Spansion device. 

With Legacy EPCS controller IP, I could flash FPGA + NIOS image using .jic file and get the build to work. 


However, when I program the flash using .pof file, I could see only FPGA is up, whereas NIOS application does not work. 


Then I changed the controller to Altera Serial Flash controller. With this, I could get both FPGA and NIOS work. 


I am very curious to understand the difference between these two IPs?  

Why .pof works with a build having Altera Serial Flash controller, but not with Legacy EPCS controller. 


Help is appreciated! 


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