公开(公告)号：CA2074008A1

公开(公告)日：1993-01-21

申请号：CA2074008

申请日：1992-07-16

Applicant: IBM

Inventor： RUEDINGER JEFFREY J ,  RUDOLPH PETER ,  SHULZE-SCHOELLING HERMANN

IPC: G06F1/12 ,  G06F12/00 ,  G06F13/42 ,  H04L7/00

Abstract: GE9-91-010 QUASI-SYNCHRONOUS INFORMATION TRANSFER AND PHASE ALIGNMENT MEANS FOR ENABLING SAME A quasi-synchronous information (clocking, data, control signals) transfer between a master unit A and at least one neighbor unit B offers the advantage that one transfer can occur every cycle where any interface delays are tolerated. When the master unit A sends its internal clock along with data and/or control signals to its neighbor unit B, the last named unit receives this clock and derives any and all locally required clocks from this clock. This keeps unit B exactly at the same frequency as unit A, although a phase shift occurs. Unit B also sends its internal clock along with data and/or control signals to unit A. When the clock signals arrive back at unit A, they will have exactly the same frequency as the internal clock of unit A but also an additional phase shift. Compensation of the overall phase shift will be done by a phase alignment means to which all signals are sent on their way to unit A.