Jtag interface circuit for emulation mode of microprocessor

The present invention relates to a microprocessor, the core having a built-in emulation block, JTAG interface for MDS (Microcomputer Development System) of a microprocessor having an internal emulator for emulation mode (emulation mode) according to the test operation of the user program, and a circuit. 32-bit Risk (RISC) microprocessors because of the fast processing speed and low power consumption characteristics of a very high economic efficiency. However, the size of the address and the hardware circuit in which the data bus is a corresponding, depending on the complexity increases, which because of the characteristics of speed and the like is reduced. Thus hameuroseo through the JTAG interface circuit generates signals for testing to improve the problems.