System and method for monitoring data, computer program and data storage therefore

摘要

To provide a system for monitoring data transmitted between to parts of an electronic machine. The system includes a mirror memory circuit 30 that is subjected to writing and reading of data in the same manner as a memory circuit 11 based on a first data to be supplied from a memory controller 12 to a memory circuit 11, and a signal sampling circuit 20 that stores in a sampling memory circuit 40 a first data as well as a second data read out of the mirror memory circuit 30. The sampling memory circuit 40 holds the exact copies of the first data supplied from the memory controller 12 to the memory circuit 11 and of the second data supplied from the memory circuit 11 to the memory controller 12. Therefore, it is possible to monitor the data transmitted between the memory controller 12 and the memory circuit 11.