I am using Altera's Cyclone EPIC20F4007 Development board and nios I processor
The problem is that I am unable to set the clk freq. from 50 Mhz to 2
Mhz and get the board working. I have changed the clk setting in th SOPC to 20 Mhz and also changed the SDRAM_CLK, PLD_CLKOUT and CL settings to 20 MHZ by factor 2/5. I have also tried different phas shift settings for SDRAM_CLK(phase shift is -63 degrees in the 5 MHZ, so I supposed it should be-25.2 degrees in the 20 Mhz???), bu every time when I try to flash some program to the system via NIOS I IDE I get the next error
sing cable "USB-Blaster [USB-0]", device 1, instance 0x0
Pausing target processor: O Reading System ID at address 0x021208B8: verifie
Downloading 01000020 ( 0%
Downloading 01010000 (86% Downloaded 75KB in 0.9s (83.3KB/s
Verifying 01000020 ( 0%
Verify failed Leaving target processor pause
Could anyone give me good advices to solve this problem?
Thank