Abstract: To measure a current of a coil of a motor with high accuracy. A motor drive control device includes a control circuit configured to generate a drive control signal based on a measurement value of a current flowing through a coil of a motor, and a drive circuit configured to drive the coil based on the drive control signal. The drive circuit includes a switch and a switch connected in series, a switch and a switch connected in series, a current detection element connected in series to the switch and the switch, and a current detection element connected in series to the switch and the switch. The coil is connected between a node with the switch and the switch connected in common, and a node with the switch and the switch connected in common. The control circuit measures the current based on a mean value of a current flowing through the current detection element and a current flowing through the current detection element.

Abstract: An address control circuit includes a setting terminal connectable to a ground potential, a time constant setting circuit connected to the setting terminal, and a control unit connected to the time constant setting circuit and configured to set an address for serial communication. The time constant setting circuit includes a resistive element disposed between the setting terminal and the control unit and configured to protect the control unit against overvoltage. The control unit outputs a voltage to the time constant setting circuit, and sets an address at a predetermined timing based on the voltage input from the time constant setting circuit when a predetermined time has passed after the output of the voltage is stopped.

Abstract: An address control circuit includes a setting terminal connectable to a ground potential, a time constant setting circuit connected to the setting terminal, and a control unit connected to the time constant setting circuit and configured to set an address for serial communication. The time constant setting circuit includes a resistive element disposed between the setting terminal and the control unit and configured to protect the control unit against overvoltage. The control unit outputs a voltage to the time constant setting circuit, and sets an address at a predetermined timing based on the voltage input from the time constant setting circuit when a predetermined time has passed after the output of the voltage is stopped.

Abstract: Disclosed is a photosensitive resin composition for use as a solder resist, which is free from anti-tackiness and excellent in flexibility, adhesiveness and heat resistance without other film properties being sacrificed, and can be easily designed so as to obtain properties in conformity with the end use thereof.

Abstract: Disclosed is a photosensitive resin composition for use as a solder resist, which is free from anti-tackiness and excellent in flexibility, adhesiveness and heat resistance without other film properties being sacrificed, and can be easily designed so as to obtain properties in conformity with the end use thereof. This photosensitive resin composition comprising (A) an active energy ray-curable resin having at least two ethylenic unsaturated linkages per molecule, (B) a photopolymerization initiator, (C) a reactive diluent, and (D) a thermosetting compound; wherein said (A) comprises a resin which is obtained by a process wherein an epoxy compound is successively reacted with a unsaturated monocarboxylic acid and with a polybasic acid to form a compound, which is then allowed to react with a novolac epoxy resin to obtain the resin. There is also disclosed a printed wiring board formed using the aforementioned photosensitive resin composition.

Abstract: An integrated circuit device comprises a mega-macro(s) and an interface block section. At least one of the mega-macro and the interface block section comprises a switching circuit for switching a mode between a test mode and a normal mode and two sets of individual dedicated terminals which are valid in the normal mode and the test mode, respectively, and serve to transfer signals to/from an internal circuit. In such an arrangement, an mega-macro isolation test can be simplified and also a designer can design the circuit in a normal mode with no consciousness of the presence of a test circuit thereby making it easy to analyze and debug the circuit, so that the burden of test designing for a designer can be removed thereby to shorten the time needed for developing the integrated circuit device.

Abstract: A plurality of rotatable members are formed with patterns of given shapes which permit the passage of a laser beam, and which are arranged in concentric circles about the axis of rotation of the members. Part of each rotatable member is disposed in the path of the laser beam so that a combination of the individual patterns on the respective rotatable members define a pattern to be printed or marked. In this manner, a variety of printing or marking patterns can be easily obtained by merely controlling the angular position of the respective rotatable members.