Silicon Laboratories Inc.
System and method to reset datapath logic within a peripheral slave device having multiple, asynchronous clock domains

Abstract:

Embodiments of improved systems and methods are provided herein to reset all datapath logic within a peripheral slave device having multiple clock domains. An embodiment of the disclosed method includes receiving a reset request from a host clock device to reset the peripheral slave device, synchronizing the received reset request to each peripheral clock domain included within the peripheral slave device, and using the synchronized reset request generated within each peripheral clock domain to reset datapath logic contained within that peripheral clock domain. As the datapath logic is being reset, the method further includes using the synchronized reset request generated within each peripheral clock domain to generate an acknowledgement for that peripheral clock domain, synchronizing the acknowledgements generated in each peripheral clock domain to a reference clock domain, and combining the synchronized acknowledgements into a single acknowledgement, which is supplied to the host clock device to complete the reset.