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Altera_Forum's avatar
Altera_Forum
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7 years ago

128 bit master to 32 bit slave

Hi ,

I am connecting a master whose data width is 128 bit. I am connecting it to a slave whose data width is 32 bit.

Master output is Avalon interface

When I trigger a data from the master, it is triggering 4 writes on slave.(32*4 =128).But that will overwrite the data in the next address. How do I tell my interconnect to consider only LSB 32 bit? Is there any setting that can be modified?

3 Replies

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

    You can use the byteenable signal thats part of the Avalon standard to mask certain bytes.

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

    --- Quote Start ---

    You can use the byteenable signal thats part of the Avalon standard to mask certain bytes.

    --- Quote End ---

    My master is a pcie hard IP configured as G3x4 128bit 250 MHz. You mean I have to manually hack the interconnect file generated by Qsys between the pcie(rxm port) and my apb slave??