METHOD AND APPARATUS FOR CLOCK DATA RECOVERY FROM MANCHESTER CODED SERIAL DATA STREAM

摘要

Methods and apparatus are presented for obtaining clock data from Manchester coded serial data streams, in which received data is sampled at a sample rate higher than the serial data baud rate, multi-bit groups of transition bits are generated which individually indicate data transition locations in a corresponding multi-bit sampled data bit group, and clock data is derived using the multi-bit groups of transition bits without requiring receipt of synchronization data or receipt of a separate clock.

主权项

1. A method for deriving clock data from a Manchester coded serial data stream, the method comprising:
receiving a Manchester coded serial data stream corresponding to an input baud rate; sampling the Manchester coded serial data stream at a sample rate higher than the input baud rate to obtain multi-bit groups of sampled bits; constructing multi-bit groups of transition bits, the multi-bit groups of transition bits individually indicating data transition locations in a corresponding multi-bit group of sampled bits; and deriving clock data based solely on the multi-bit groups of transition bits.