Microprocessor maintaining memory consistency

摘要

In a microprocessor, a serial address register (81) stores an address that requires a guarantee of an access order. A serial address comparator (82) compares an address supplied from a CPU (2) with the address stored in the serial address register. When these addresses coincide with each other as a result of comparison, the succeeding access request is delayed until a bus control section (5) has accepted the preceding access request and has completed the operation. The succeeding access request is executed after the preceding access request has been completed. <IMAGE>