Snoop and replay for completing bus transaction

摘要

Systems and devices configured to implement techniques for ensuring the completion of transactions while minimizing latency and power consumption are described. A device may be operably coupled to a bidirectional communications bus. A bidirectional communications bus may include a clock line and a data line. The device may be configured to determine if an initiated transaction corresponds to a device in a low power state. The device may pause the transaction. The device may replay portions of the transaction when the device is in an appropriate power state. The device may replay portions of the transaction using an override interface.

主权项

1. A method for completing a bus transaction, the method comprising:
receiving an address corresponding to one of a plurality of devices operably coupled to a communications bus; determining whether the address corresponds to a device that is in a power state that does not enable completion of a transaction; and upon determining the address corresponds to a device that is in a power state that does not enable completion of a transaction,
pausing a transaction associated with the received address;causing the device to enter a power state that enables completion of the bus transaction;transmitting the received address to the device; andreleasing the transaction.