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Hi all !. I m stucked withe the following problem :
My system is built with a NIOS II, JTAG UART, one AM29LV065D flash, and 2 IDT71V416S RAM. I am using Quartus 4.2 SP1, IDE 1.1. When I try to run a hello world on my IDE console I get the following message : <div class='quotetop'>QUOTE </div> --- Quote Start --- Using cable "USB-Blaster [USB-0]", device 1, instance 0x00 Pausing target processor : not responding Resetting and trying again : FAILED leaving target processor paused[/B][/b] --- Quote End --- I did the following test to check my design : - run Hello world from an onchip memory : OK - run few Write and Read cycle to my external memories from an onchip memory : OK - run Hello world from my external Flash memory : NOK - run Hello world from my external Ram memory : NOK - Check power supply on RAM and Flash : OK - Check access timing on RAM and Flash : OK - Download program to flash with IDE Flash programmer : OK - Try different PLL frequency to the NIOS from 50 MHZ to 80 MHz. I am really running out of solutions now !. Heeeeeeeeeelp please !!!. greg http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gifLink Copied
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<div class='quotetop'>QUOTE </div>
--- Quote Start --- run Hello world from my external Flash memory: NOK[/b] --- Quote End --- What do u mean? Have u downloaded to flash your program and configuration data?Is your reset address in flash space (SOPC setting)?and program and data memory setting in IDE? bye- Mark as New
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WE added a pull up on the CS of the flash and RAM and it works fine now. Thanks for your efforts.
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--- Quote Start --- originally posted by gregoryw@Jun 8 2005, 05:17 AM we added a pull up on the cs of the flash and ram and it works fine now. thanks for your efforts. --- Quote End --- How exactly did you do that? Is that a pull up resistor on one of the FPGA pins?
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I soldered on the board a 5K resistor pull up to the 3.3V on both Flash and RAM.
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is this on a development board or your own custom solution?
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I had to do that on 2 different custom boards.

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