Applies to:AMBA AHB

The HGRANT signal can change in any cycle and the following cases are possible:

• It is possible that the HGRANT signal may be asserted and then removed before the current transfer completes. This is acceptable because the HGRANT signal is only sampled by masters when HREADY is high.
• A master can be granted the bus without requesting it.
• The above point also means that it is possible to be granted the bus in the same cycle that it is requested. This can occur if the master is coincidentally granted the bus in the same cycle that it requests it.

See also:

• AMBA 2.0 Specification
• When will the arbiter grant another master after a locked transfer?
• If a master is currently granted the bus by default, how many cycles before starting an non-IDLE transfer does it have to assert HBUSREQ?
• Can a master perform transfers other than IDLE when the bus was granted to it, but not requested by the master?

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