AMBA AHB HREADYOUT signal

Discussion in 'Hardware' started by shaiko, Sep 9, 2011.

  1. shaiko

    shaiko

    Joined:
    Sep 9, 2011
    Messages:
    3
    Hello,

    I have a question about the HREADYOUT signal of an AMBA AHB slave:
    Is it allowable for the slave to drive the HREADYOUT signal low (HREADY <= '0') when it's not being addressed by any master?
    Or must it assert an HREADYOUT <= '1' when it's not being addressed?

    This is strictly a protocol compliance question - this would dictate the default state machine value for the HREADYOUT signal.

    Or in other words - the HREADYOUT value at the "idle_state" of the FSM.
    Does anyone know the answer?
    Do the specs dictate such a value? or it's up to the designer to decide?
    shaiko, Sep 9, 2011
    #1
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