INTEGRATED CIRCUIT

摘要

PURPOSE: To provide an in-circuit emulation ability mode to be incorporated in an integrated circuit. CONSTITUTION: The in-circuit emulation ability mode disables the microcontroller (40) of the integrated circuit and permits the usage of an in- external circuit emulator for testing and debugging the integrated circuit without necessity to physically replace the microcontroller (40) with an in-circuit emulator hardware. The in-circuit emulation ability mode is applied in any integrated circuit but it is discovered that the integrated circuit where the in-circuit emulation ability mode is specially suitable for incorporation to the mainbody and the transmitter/receiver of a cordless telephone where MODEM voice, a precision channel, a microcontroller (40) part and the man-machine interface function of the cordless telephone are integrated.