Patent ID: 6366878
Filing Date: 2002-04-02
Classification: G06F

Abstract:
A circuit arrangement for in-circuit emulation, comprising:a first and a second identical microcontroller which in each case have at least five external connections as well as a connecting device that serves to connect the connections inside the first and the second microcontroller to one another and to the internal function units of the first and the second microcontroller, and has a different setting in the first and second microcontrollers, and comprising a memory for an operating program with data and address connections, the identical connections of the two microcontrollers not being connected to one another, the data and address connections of the memory being connected in each case to one of the connections of the first microcontroller and the data connection of the memory being connected to one of the connections of the second microcontroller, the microcontrollers being mutually connected to one another via one connection in each case, and the remaining connections of the microcontrollers being connected to an application system, and the connecting devices providing the function units of the first microcontroller with the operating program from the memory, and the signal traffic at the remaining connections of the second microcontroller being connected via a terminal to the second microcontroller.