| 摘要 |
PURPOSE:To realize the real-time run of a user program by turning off an on-chip cache memory of an MPU just in the first one cycle when the user program starts its run. CONSTITUTION:A RUN signal 10 is produced at the end of an ICE (in-circuit emulator) program, and a user program starts its run at a break address 100. A signal 5A is set at an H level at the rise of an output signal 11B of the next address 101, and the user program can be fetched by a on-chip cache memory of a microprocessor MPU 11. The user program runs to an address 102 and returns to the address 100 with a jump, and the MPU 11 has an external access to produce a signal 2A. At the same time, a signal 3A is sent to a break circuit. Thus even an MPU containing an on-chip cache memory can have a break and the user program can be run in real time. |
