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-   -   AMBA AHB HREADYOUT signal (http://www.velocityreviews.com/forums/t753822-amba-ahb-hreadyout-signal.html)

shaiko 09-09-2011 06:32 PM
AMBA AHB HREADYOUT signal
 
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?


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