Abstract: A PWM control circuit is configured to control the operation of an external circuit, and stop operations upon input of an anomaly detection signal from an externally provided anomaly detection circuit. A voltage detection circuit is configured to detect a change in the voltage value of a power source voltage and generate and output a hardware reset signal. A reset circuit outputs a reset signal to reset an entire device if the hardware reset signal from the voltage detection circuit, a software reset signal from a CPU, or the anomaly detection signal becomes active.

Abstract: A microcontroller unit (MCU) includes a central processing unit (CPU) that reads a program from a flash read-only memory (ROM) and executes a process, a remapping register that stores a read destination of the flash ROM to be read by the CPU, an overwrite flag register that stores a flag that determines whether or not to overwrite the program stored in the flash ROM when the CPU is reset, and a dedicated remapping reset register that resets the CPU and the remapping register but does not reset the overwrite flag register when a value indicating resetting of the CPU and the remapping register is written thereto.

Abstract: A notification response circuit includes a reception coil, a characteristic variable circuit connected to the reception coil, and a switch control circuit. The reception coil is configured to generate a current based on an external electromagnetic field. The characteristic variable circuit includes at least two circuits of a variable capacitor circuit, a voltage output circuit, and a variable resistor circuit. The variable capacitor circuit is configured to change a capacitance. The voltage output circuit is configured to change a voltage value between a pair of connection lines disposed between the reception coil and the voltage output circuit according to a voltage value of a reference voltage. The variable resistor circuit is configured to change a resistance value. The switch control circuit selectively switches any of the at least two circuits and performs control to change impedances of the reception coil and a circuit part connected to the reception coil.

Abstract: A fingerprint authentication device includes: a fingerprint acquisition section that acquires fingerprint image data; a fingerprint image correction processing section that corrects a pixel value by using a correction coefficient for making a first pixel value of the brightest pixel in a group of pixels at which an integrated value of a number of pixels at a dark portion side in a histogram becomes a predetermined proportion with respect to an integrated value of a number of all pixels, be a brighter second pixel value; a spectral data generation section that generates a spectral data matrix including directions of ridges of a fingerprint and a frequency of the fingerprint; a registered spectral data matrix archive section that archives a registered spectral data matrix; a fingerprint verification section that verifies the spectral data matrix and the registered spectral data matrix; and an authentication results output section that outputs results of authentication.

Abstract: A fingerprint authentication device includes: a fingerprint acquisition section that acquires fingerprint image data; a fingerprint image correction processing section that corrects a pixel value by using a correction coefficient for making a first pixel value of the brightest pixel in a group of pixels at which an integrated value of a number of pixels at a dark portion side in a histogram becomes a predetermined proportion with respect to an integrated value of a number of all pixels, be a brighter second pixel value; a spectral data generation section that generates a spectral data matrix including directions of ridges of a fingerprint and a frequency of the fingerprint; a registered spectral data matrix archive section that archives a registered spectral data matrix; a fingerprint verification section that verifies the spectral data matrix and the registered spectral data matrix; and an authentication results output section that outputs results of authentication.

Abstract: There is provided an image processing method for acquiring a partial image a target and constructing one whole image of the target. The acquired partial image is stored in a first storage section. A movement amount of an image is calculated using a previous partial image and a latest partial image. A partial image having a minimum difference from the latest partial image in an overlapping portion therebetween is stored in a second storage section. The partial image having the minimum difference as the latest partial image in the first storage section is stored when it is determined that the calculated movement amount is more than the predetermined value.

Abstract: Halting clocks of pipeline registers 28-31 and data memory 26, etc., and holding input data of each of FE, DC, MEM, WB stages, during when a nop is sent to each of pipelines, by a first process for outputting a nop signal S41 of logic level “H” when the nop is detected by a nop detecting circuit 41, a second process for sending the detected nop signal to each of the pipelines by F/Fs 46-48 placed between each of the pipelines, and a third process for halting clocks by clock control circuits 42-45 placed in each of the pipelines when the nop signal is sent to each of the pipelines.