Rising and falling edge detection and re-assembly for high speed serial data communications

1. A method, comprising:

receiving a serialized data stream;

detecting rising and falling edges in the serialized data stream;

correlating the rising and falling edges to data values using a clock signal that is not derived from the serialized data stream; and

converting the serialized data stream to a parallel data stream.

2. The method of claim 1 , wherein the clock signal is derived from a local clock.

3. The method of claim 1 , wherein the clock signal is derived from a clock on a remote device sending the serialized data stream.

4. The method of claim 1 , wherein the serialized data stream is received from a serial link having a differential pair.

5. The method of claim 1 , wherein the correlating the rising and falling edges to data values using the clock signal includes determining a number of intervals between the detected edges, each interval corresponding to a predefined period derived from the clock signal.

6. The method of claim 5 , wherein the types of edges and the number of intervals between the edges are stored in a table, the table being used to deserialize the data stream.

7. The method of claim 5 , wherein a second edge of a same type detected within less than 50% of one interval is ignored.

8. The method of claim 5 , invoking a bit error recovery algorithm when two consecutive edges of the same type are detected within greater than or equal to one interval.

9. A system, comprising:

a processor and logic integrated with and/or executable by the processor, the logic being configured to:

receive a serialized data stream;

detect rising and falling edges in the serialized data stream;

correlate the rising and falling edges to data values using a clock signal that is not derived from the serialized data stream; and

convert the serialized data stream to a parallel data stream.

10. The system of claim 9 , wherein the clock signal is derived from a local clock.

11. The system of claim 9 , wherein the clock signal is derived from a clock on a remote device sending the serialized data stream.

12. The system of claim 9 , wherein the serialized data stream is received from a serial link having a differential pair.

13. The system of claim 9 , wherein the correlating the rising and falling edges to data values using the clock signal includes determining a number of intervals between the detected edges, each interval corresponding to a predefined period derived from clock signal.

14. The system of claim 13 , wherein the types of edges and the number of intervals between the edges are stored in a table, the table being used to deserialize the data stream.

15. The system of claim 13 , wherein a second edge of a same type is detected within less than 50% of one interval is ignored.

16. The system of claim 13 , invoking a bit error recovery algorithm when two consecutive edges of the same type are detected within greater than or equal to one interval.

17. A computer program product, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions readable and or executable by a device to cause the device to perform a method comprising:

receiving a serialized data stream;

detecting rising and falling edges in the serialized data stream;

correlating the rising and falling edges to data values using a clock signal that is not derived from the serialized data stream; and

converting the serialized data stream to a parallel data stream.

18. The computer program product of claim 17 , wherein the clock signal is derived from a local clock.

19. The computer program product of claim 17 , wherein the clock signal is derived from a clock on a remote device sending the serialized data stream.

20. The computer program product of claim 17 , wherein the serialized data stream is received from a serial link having a differential pair.