초록 ▼

A system of monitoring and protecting integrated circuits against damage due to over temperature conditions functions to monitor the temperature of an IC and either shut down its input clock signal or assert its reset line if case temperatures rise to high. Heat dissipated by an integrated circuit i

A system of monitoring and protecting integrated circuits against damage due to over temperature conditions functions to monitor the temperature of an IC and either shut down its input clock signal or assert its reset line if case temperatures rise to high. Heat dissipated by an integrated circuit is sensed by a temperature sensor. The temperature sensor is thermally coupled to the integrated circuit via thermal glue or other thermally conductive means. The output of temperature sensor is input to temperature sensor circuitry which converts the low level output of the temperature sensor into a signal that can be read by a processor. The processor is suitable programmed to monitor the output of temperature sensor circuitry. When the temperature of the integrated circuit rises past a predetermined threshold value, the processor outputs a control signal to the clock generator circuitry causing it to switch off its clock signal input by the integrated circuit or asserts the chips reset line. Either action should prevent any further temperature rise of the chip. Other embodiments include monitoring multitude integrated circuits and placing the sensing components within the chip itself. In addition, an embodiment is disclosed that utilizes the JTAG interface standard included in many integrated circuits to transmit temperature information to the processor. In addition, the present invention can be used to generate heat maps of circuit boards, useful during prototyping and in the management of real systems.

대표청구항 ▼

[ What is claimed is:] [1.] A system of monitoring the temperature of an integrated circuit, the system comprising:a temperature sensor thermally coupled to said integrated circuit;temperature sensor circuitry coupled to said temperature sensor, said temperature sensor circuitry operative to generat

[ What is claimed is:] [1.] A system of monitoring the temperature of an integrated circuit, the system comprising:a temperature sensor thermally coupled to said integrated circuit;temperature sensor circuitry coupled to said temperature sensor, said temperature sensor circuitry operative to generate a signal in proportion to the temperature of said integrated circuit;a processor coupled to said temperature sensor circuitry, said processor operative to monitor the output of said temperature sensor circuitry; andmeans for holding the integrated circuit in reset, the integrated circuit being held in reset upon the temperature of said integrated circuit exceeding a predetermined threshold level thus protecting said integrated circuit from damage due to an over temperature condition.