A synchronous signal producing circuit includes an access inhibit region register for designating an access inhibit region for a processor in a shared memory, a comparing circuit for detecting the access by the processor to the access inhibit region designated in the access inhibit region register, and...http://www.google.com/patents/US6928523?utm_source=gb-gplus-sharePatent US6928523 - Synchronous signal producing circuit for controlling a data ready signal indicative of end of access to a shared memory and thereby controlling synchronization between processor and coprocessor
