Read data from LPM ROM

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Milenia

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Hi guys.

I am beginner in FPGA and VHDL. Currently I have problem with my design. Does everybody knows how to read data in lpm rom?
 

Taken from Altera's website:
Important: Altera recommends using the altsyncram megafunction instead of the lpm_rom megafunction. This megafunction is provided only for backward compatibility. This option is available for all Altera devices except MAX 3000 and MAX 7000 devices.

Are you using a MAX3000 or MAX 7000?

Other than that, reading a ROM normally just takes placing the address on the address input and enabling the read along with the clock.
 

No. I am using Altera de2 115 board. Sorry. I did not understand. Could you simplified it because I am very beginner in FPGA and VHDL
 

don't use lpm_rom for the ROM, use the altsyncram megafunction (that should have been clear)

if the problem is the reading, well you use timing like this.


- - - Updated - - -

you should try writing a testbench and just run the ROM in a simulation to see what happens when you change the signals.
 

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