A method and apparatus is provided for transmitting multi-bit data across asynchronous
time domains. In one embodiment, the apparatus includes a first delay circuit to
generate a selector signal based upon an input reference signal of a first time
domain, a second delay circuit to generate a delayed data signal based upon an
input data signal, and selection logic coupled to the first and second delay circuits
to select one of the data signal and the delayed data signal based upon the state
of the selector signal in accordance with an input clock signal of a second time
domain, such that at any given sampling point of the input clock signal, the selector
signal indicates valid data.
