Data strobe multiplexer

A system comprising:

• a host device;
• and
• a multiplexer circuit configured to receive a data signal and a data strobe signal from an embedded MultiMediaCard (eMMC) device, and to selectively provide one of the data signal or the data strobe signal to a data pin of the host device,
• wherein the host device is configured to receive an output of the multiplexer circuit at the data pin of the host device, and
• wherein the host device is configured to:
• determine a timing relationship between the data strobe signal received from the multiplexer circuit at the data pin of the host device and an internal clock signal in a calibration mode;
• and
• control sampling of the data signal received from the multiplexer circuit at the data pin of the host device using the determined timing relationship in a data read mode.

A method comprising:

• receiving, at a multiplexer circuit, a data signal and a data strobe signal from an embedded MultiMediaCard (eMMC) device, and selectively providing, using the multiplexer circuit, one of the data signal or the data strobe signal to a data pin of a host device;
• determining, using the host device, a timing relationship between the data strobe signal received from the multiplexer circuit at the data pin of the host device and an internal clock signal in a calibration mode;
• and
• controlling, using the host device, sampling of the data signal received from the multiplexer circuit at the data pin of the host device using the determined timing relationship in a data read mode.