Patent ID: 7978754
Filing Date: 2011-07-12
Classification: G11C,H04L

Abstract:
1. A method of operation in a system including a communication channel, the communication channel including a first component having a transmitter, a second component having a receiver and a communication link coupling the first and second components, comprising: after a power up event, executing a calibration process to determine a calibrated parameter value for the communication channel, and storing the calibrated parameter value in nonvolatile memory; upon restarting the communication channel in the field, accessing the calibrated parameter value in nonvolatile memory, and setting a value for an operating parameter of the communication channel using the calibrated parameter value; and communicating data on the communication channel using the operating parameter; and after said restarting, adjusting the value for the operating parameter to account for changes in environmental conditions which have an effect on the communication channel using another calibration process that includes transmitting a calibration pattern from the first component and receiving the calibration pattern in the second component after setting the operating parameter using the calibrated parameter value; wherein the communication channel has a plurality of operating parameters which drift during operation in response to changes in environmental conditions, and including storing calibrated parameter values for each of the plurality of operating parameters in the nonvolatile memory.