Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

on chip sd ram

hi,

i want build a on chip ram memory of 21kb. i wish acivate the on chip sd ram memory with spoc builder. while adding the module i faced the error" onchip_mem.s1": must be connected to avalon-mm master.

i saw some threads based on this issue in the forum. following that i addded the avalon mm tristate bridge found on the bridges and adaptors (memory mapped). but again i faced the same error?

can anybody help me plz?

2 Replies

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

    Hello

    When you talk about on-chip SD RAM, do you mean a SD RAM memory on your PCB?

    When you add an on-chip memory in sopc you need an avalon master to handle the communication with the memory. This could be a NIOS 2 processor or a custom block with a avalon master interface. Do you got any such block in your system?

    Best Regards,

    Ola Bångdahl
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    You don't need the tri-state bridge - this is for adding external memory. The internal on-chip memory just needs connecting to the cpu's data and/or instruction master - click on the blob(s) in the connection column. If this column is not visible make it so with the View menu.