Emulation system for emulating CPU core, CPU core with provision for emulation and ASIC having the CPU core

摘要

An IC is provided with a CPU core selected from a plurality of CPU cores, each of which has a specific function. Each CPU core has a system-bus terminal and a common emulator connecting-exclusive terminal. The IC is also provided with a predetermined function device connected to a system bus of the selected CPU core. An emulation bus connects an emulator to the selected CPU core via the common emulator connecting-exclusive terminal. An emulator performs emulation on the selected CPU core which is connected via the emulation bus when the selected CPU core is in a monitor mode. The number of terminal elements and the function associated with each terminal element of the common emulator connecting-exclusive terminal are identical among the common emulator connecting-exclusive terminals.