| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an effective and flexible protection unit for memory protection. <P>SOLUTION: An access to a memory element 17 by a processing device is approved if a first access control unit 31 and a second access control unit 32 of a memory protection unit 15, 16 associated with the processing device approve the access, and the access is rejected if the first access control unit 31 or the second access control unit 32 rejects the access. The first access control unit 31 is programmable only by an associated processing device, and the programming of the second access control unit 32 is readable by an additional processing device which is to be used in a system with multiple processing devices and is not the aforementioned associated processing device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
