How many bit word for sram?

i don't know.

Can you do an example?

If i need all memory?

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The sram that i have on my cyclone 2 is 512 Kbye (256K * 16 bits).

What i must write in the megaplugin manager in the window in this link?

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There is probably some misunderstanding. As far as I know cyclone 2 (http://www.altera.com/literature/hb/cyc2/cyc2_cii51008.pdf) does not have 256K * 16bits (~ 65,000,000 bits) on-chip memory. The EP2C70 is the largest device with a total of 1,1520,000 RAM bits.

In the assumption that you want to use on-chip memory you can of course only use what is available.

In the Megawizard you can specify the bit-width of the memory. In your case this is '1'. For "How many 1-bit words of memory" you should specifiy the amount of these words that you need. In your form you specified 256 words. This means that you can address your memory with 8 bits (2^8 = 256).

Hope this helps

I have an Ep2C35

De2 User Manual

sram

·

512-Kbyte Static RAM memory chip

·

Organized as 256K x 16 bits

· Accessible as memory for the Nios II processor and by the DE2 Control Panel

Memory Data Sheet

The issi IS61LV25616 is a high-speed, 4,194,304-bit static

RAM organized as 262,144 words by 16 bits. It is fabricated

using issi's high-performance CMOS technology. This highly

reliable process coupled with innovative circuit design techniques,

yields high-performance and low power consumption

devices.

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I have an Ep2C35

De2 User Manual

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You are refering to off-chip memory. The "memory compiler" in the MegaWizard is for on-chip memory. This means the memory blocks that are in your Cyclone II Fpga. You are refering to the off-chip SRAM module on your DE2 board.

You can directly address your SRAM from your FPGA (but not via the MegaWizard), or you can add this SRAM very easily in the SOPC Builder. The university program ip cores (http://www.altera.com/education/univ/materials/ip-cores/unv-ip-cores.html) already provide prepared interfaces of the SRAM on the DE2 board in the Avalon fabric.

I'm afraid you are not doing this the correct way round...

First you should describe what you want to do. Then you can determine how much memory you need, and depending on available resources you can decide if you are going to use on-chip memory or the external RAM.