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Does AHB Specification prohibit a combo path from HTRANS to HREADYOUT?

alinx

Hello, 

I am trying to find information for AHB Specification (IHI0033C). Are AHB subordinates allowed to have a combo path from  HTRANS to HREADYOUT?

Thanks

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  • 0 Arm Employee Badge

    It wouldn't make sense to have such a path.

    HTRANS is an address phase signal, and HREADYOUT is a data phase signal, so you would use HCLK rising to sample the HTRANS value to see what the AHB manager required before the subordinate would know what it wanted to signal on HREADYOUT.

    To turn the question back to you, why would you ever want to have a combinatorial path from HTRANS to HREADYOUT ?

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  • 0 Arm Employee Badge

    It wouldn't make sense to have such a path.

    HTRANS is an address phase signal, and HREADYOUT is a data phase signal, so you would use HCLK rising to sample the HTRANS value to see what the AHB manager required before the subordinate would know what it wanted to signal on HREADYOUT.

    To turn the question back to you, why would you ever want to have a combinatorial path from HTRANS to HREADYOUT ?

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