Apparatus and method for programmable read preamble with training pattern

摘要

A memory device is provided. The memory device includes a preamble memory and a memory controller. The preamble memory is arranged to store a read preamble such that the read preamble includes a training pattern that is suitable for aligning a capture point for read data. Further, the training pattern is programmable such that the training pattern can be altered at least once subsequent to manufacture of the preamble memory. In response to a read command, the memory controller provides the read preamble stored in the preamble memory, as well as the read data.

主权项

1. A memory device, comprising:
a preamble memory that is arranged to store a read preamble such that the read preamble includes two training patterns that are suitable for:
aligning a capture point for read data on two communication lines; anddetermining a period of time within a clock cycle the read data is simultaneously available on the two communication lines,wherein the training patterns can be altered at least once subsequent to manufacture of the preamble memory, wherein the preamble memory is configured such that the read preamble is programmable during power up, and further configured such the read preamble is locked after power up is complete; and a memory controller that is configured, in response to a read command, to:
provide the read preamble stored in the preamble memory; andprovide the read data.