High speed peripheral system interface

摘要: A peripheral interface system connects a control unit (PCU) which controls plurality of input/output devices having different data byte transfer rates with an controller (IOC) processing system. (A as used herein is defined desired predetermined number bits, typically seven to 10 although it could be one bit). When the rate less than maximum asynchronous system, operates in first mode transfers bytes information by are controlled synchronism energization and deenergization pair strobe lines exceed IOC conditions operate second established additional lines. energized PCU when device at greater rate. The response line turn energizes signalling that can proceed Means included both responsive joint condition synchronously synchronous timing signals applied generated clock circuits IOC.