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Altera_Forum's avatar
Altera_Forum
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16 years ago

Flash Connection Problem

Hi there,

I use the Altera EP3C120F780 Development board, and try to load files into the onboard flash memory.

therefore i build a project in the (in the Screenshot).

if i try to get the cfi-table like its explained in the flash-programmer-pdf i just get no-cfi table found at (base address).

Base-address should be right, also the sopc-system but im not sure of the timings 4 the flash-memory-controller in the sopc.

i looked in the datasheet of the flash device 4 the timings and thought that the timings should be setup:75ns; wait:35ns; hold:35ns but im not sure.

and there is another problem if i use a clock higher then 50MHz 4 the NIOS2 it dont responds so i use 50MHz 4 the NIOS2 and 200MHz 4 the flash-controller( i also tried 50 MHz).

if anybody got a clue, pls help i trying since 2 days -.-

greets

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    I still cant get any response from the flash, i also put Data(0) PIN of my output from the SOPC system floating.

    Is noone of Altera here who got a clue?

    Is sth with the board wrong?

    or is the flash memory not accassable?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    its version 9.1

    but i think i got the solution. the pin READ_busy was connected with READ_N of my design. but there are still some problems with the timing i think it should be setup:35ns; wait:75ns; hold:35ns if i interpretet the datasheet right but i dont get the CFI-table correct.

    maybe im wrong or i've missunderstood the timings or could it be that the setup times of the datasheet are not right ones cause i thougt it should be the flash with 110 ns Readcycle time.

    thx 4 reply