During a trace the timing stream has the active and stall information, PC stream has all the discontinuity information, and the data stream has all the data log information. The various streams are synchronized using markers called sync points. The sync points provide a unique identifier field and a...http://www.google.com.hk/patents/US7797685?utm_source=gb-gplus-share專利 US7797685 - Method for generating timing data packet