Dynamic Timing Calibration Systems and Methods
AssigneeGoogle Inc.
InventorJens Kristian Poulsen
Life of this patent
Estimating the term…
Abstract
Provided herein are systems and methods for performing dynamic adaption and correction for internal delays in devices connected to a common time-multiplexed bus. The methods allow devices to operate reliably at a higher bus frequency by correcting for inherent and unknown delays within the components and in the system by measuring the actual delays using multiple readings with the bus. Intrinsic noise and jitter are used to increase the precision of the measurements, thereby essentially using these uncertainties as self-dithering for increased measurement resolution. During adaption, delays may be adjusted in multiple step sizes to speed adaption time.
Claims20
A method, comprising:
- writing, by a first device, a first write value to a bus, wherein a line of the bus is used for time-multiplexed clock and data communication;
- writing, by a second device, a second write value associated with the first write value written to the bus;
- and
- writing, by the first device, a response to the second device based, at least in part, on a first read value read from the bus, wherein the response is configured to calibrate communications on the bus.
A system for performing bus communications, comprising:
- a bus;
- a first device and a second device communicably coupled to a line of the bus that is used for time-multiplexed clock and data communication;
- the first device is configured to:
- write a first write value to the bus;
- and
- write a response to the second device based, at least in part, on a first read value read from the bus, wherein the response is configured to calibrate communications on the bus between the first device and the second device;
- and
- the second device is configured to write a second write value associated with the first write value written to the bus.
Dependencies are inferred from the claim text.