| 摘要 |
The present invention relates to a processing apparatus and the like including an internal circuit having a CPU executing a program and an internal memory storing an internal program, and an external memory provided exteriorly of the internal circuit and storing an external program. The present invention intends to prevent the illicit interpretation and interpolation of programs and data. An internal circuit 10 mounted on an LSI 100 includes an address controller 106 monitoring whether or not an address on bus lines 111 and 112 is in a predetermined address region while a CPU 101 is executing a program stored in an external memory 20, and notifying the CPU when detecting the address in the predetermined address region.
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