Dynamically changing data access bandwidth by selectively enabling and disabling data links

A first integrated circuit device comprising:

• a plurality of driver circuits to transfer data to a second integrated circuit device via a plurality of signaling links;
• a steering circuit to select between concurrently routing the data across all of the driver circuits if all of the driver circuits are enabled and employing at least partial serialization to route the data to a first subset of the driver circuits if a second subset of the driver circuits is disabled;
• a control circuit to transfer control information between the first integrated circuit device and the second integrated circuit device, wherein the control information provides an indication of how many of the signaling links are employed to transfer the data;
• and
• a calibration circuit to update, while the second subset of the driver circuits is disabled, at least one timing adjustment value for the disabled second subset of the driver circuits based on first calibration information generated to calibrate the first subset of the driver circuits while the second subset of the driver circuits is disabled and second calibration information generated to calibrate the second subset of the driver circuits while the second subset of the driver circuits is enabled.

A method for transferring data from a first integrated circuit device to a second integrated circuit device via a plurality of driver circuits that drive a plurality of signaling links, the method of comprising:

• selecting between concurrently routing the data across all of the driver circuits if all of the driver circuits are enabled and employing at least partial serialization to route the data to a first subset of the driver circuits if a second subset of the driver circuits is disabled;
• transferring control information between the first integrated circuit device and the second integrated circuit device, wherein the control information provides an indication of how many of the signaling links are employed to transfer the data;
• and
• updating, while the first subset of the driver circuits is enabled, at least one timing adjustment value for the disabled second subset of the driver circuits based on based on first calibration information generated to calibrate the first subset of the driver circuits while the second subset of the driver circuits is disabled and second calibration information generated to calibrate the second subset of the driver circuits while the second subset of the driver circuits is enabled.