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Altera_Forum
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20 years ago

16BIT memory

Hello there!

Because of insufficient pins, i was forced to use a 16 bit SRAM memory. Now i want to run the program from this memory. i am using the cypress 32bit mem megafunction and have used a doubled clock for memory access. i asked altera for the documentations but i did not get any.

has someone done this before and can help me with this?

thanks

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    --- Quote Start ---

    originally posted by raghuraman@Oct 13 2005, 07:11 AM

    i am using the cypress 32bit mem megafunction and have used a doubled clock for memory access.

    --- Quote End ---

    I'm not sure what you mean by "doubled clock" (DDR-style data on both clock edges, or simply doubled clock frequency?).

    That said, you probably don't want the Cypress 32 bit memory component. You should create a custom component with no HDL files, make its slave an Altera Tristate Bus type, with memory addressing (instead of "native/register" addressing), and add whatever signals you need to hook up to the memory (CE=chipselect, WE=write, OE=read, A[...]=address, D[...][]=data). Then add it and an Altera Tristate Bridge to your design, hook it all up, and you should be good.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    no, i just used doubled clock frequency for the memory. i have no exp creating a custom component. i will try it now and let u know. thank u!

    The NIOS IDE says that byteblaster II is not supported and may cause communications problems. Could this be the problem, because i see opcode fetches happening in the Disassembly window...