| 摘要 |
PROBLEM TO BE SOLVED: To provide a microcontroller capable of diagnosing a peripheral module without applying a load to a CPU. SOLUTION: In the microcontroler having the CPU 10, a ROM 20 and a RAM 21 which store an instruction executed by the CPU and data, peripheral modules 60, 61, 62, a CPU bus 70 to which the CPU, the ROM and the RAM are connected, a peripheral bus to which the peripheral modules are connected and a bus bridge 30 which connects the CPU bus with the peripheral bus, it has a RAM 50 connected to the peripheral bus and a diagnostic module 40 which reads a diagnostic program stored in the RAM and performs processing, the diagnostic module 40 reads a register of the peripheral module whose address is specified by the diagnostic program, compares comparison data to be specified by the diagnostic program with a value of the register of the peripheral module based on comparison conditions to be specified by the diagnostic program and outputs a signal indicating whether or not the comparison conditions are established. COPYRIGHT: (C)2006,JPO&NCIPI
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