Abstract: A pulse transmission technique is used for wireless communication between a microcomputer (13) having a debugging support circuit (17) and a debugger (13). The pulse transmission technique is based on magnetic field coupling between a first coil (14) provided for the microcomputer and a second coil (8) coupled with the debugger. During an initialization operation, the microcomputer performs a process of configuring a communication condition of the wireless communication to perform the wireless communication. The microcomputer awaits control from the debugger when the microcomputer establishes communication with the debugger. The debugger awaits establishment of the communication and proceeds to control of the microcomputer in accordance with the wireless communication. It is possible to provide contactless interface for system debugging without the need for a large antenna or a large-scale circuit for modulation and demodulation.

Abstract: A pulse transmission technique is used for wireless communication between a microcomputer (13) having a debugging support circuit (17) and a debugger (13). The pulse transmission technique is based on magnetic field coupling between a first coil (14) provided for the microcomputer and a second coil (8) coupled with the debugger. During an initialization operation, the microcomputer performs a process of configuring a communication condition of the wireless communication to perform the wireless communication. The microcomputer awaits control from the debugger when the microcomputer establishes communication with the debugger. The debugger awaits establishment of the communication and proceeds to control of the microcomputer in accordance with the wireless communication. It is possible to provide contactless interface for system debugging without the need for a large antenna or a large-scale circuit for modulation and demodulation.

Abstract: A shock absorber preferably used for an automobile aims at inhibition of noise caused by self-induced vibration. The shock absorber includes a piston, a working cylinder for housing the piston; and a rod, one end of which being attached to the piston and the other end of which projecting from the working cylinder, wherein a friction coefficient ? between the piston and the working cylinder is represented by the formula ??3h2/rl, where, r is the radius of the piston; 2h is the height of the piston; and l is the length of a portion of the rod, which portion is stored in the working cylinder when the piston is neutral.

Abstract: A shock absorber preferably used for an automobile aims at inhibition of noise caused by self-induced vibration. The shock absorber includes a piston, a working cylinder for housing the piston; and a rod one end of which is attached to the piston and the other end of which projects from the working cylinder; wherein a friction coefficient &mgr; between the piston and the working cylinder is represented by the formula &mgr;≦3h2/rl (where, r is the radius of the piston; 2h is the height of the piston; and l is the length of a portion of the rod, which portion is stored in the working cylinder when the piston is neutral).

Abstract: An emulator microcomputer unit has a plurality of semi-cylindrical through-holes around the periphery of a substrate of the emulator MCU. L-shaped connection terminals or pins are electrically connected to the semi-cylindrical through-holes. A foot print defined by the connection terminals is equivalent to or corresponds to a foot print defined by connection terminals of an OTP or flash microcomputer IC to be used during a final test operation. The microcomputer IC chip and the connector for connecting the unit to the emulator may be mounted on the same or on opposing surfaces of the substrate.

Abstract: An emulator probe accelerates the efficiency of program debugging work with an emulator. The emulator probe includes an emulator coupling device in which lead terminals are soldered on string-like cut-out sections provided on the sides of a board having the same dimensions as a package molding portion of a microcomputer. As required, the emulator coupling device or a microcomputer is mounted on an IC socket provided on a target board.

Abstract: Disclosed herein is a semiconductor device package including a ground frame formed of a metal plate. The ground frame has a rectangular central portion, four legs integrally extending outward from the four corners of the central portion, and four grounding lead terminals formed integrally with the outer ends of the four legs. The width of each grounding lead terminal including a grounding portion is set to about three to five times the width of each lead terminal. The outer end of each grounding lead terminal is slightly projected outward from the outer end of each lead terminal. Accordingly, a stable ground potential can be ensured, and deformation of each lead terminal can be reliably prevented.

Abstract: An emulator probe comprising a direction changing board 10 having a first connector 11 to be coupled to a relaying connector 9 set on one surface thereof and a second connector 12 set on the other surface thereof such that the direction of setting of the same is different from the direction of setting of the first connector 11 and adapted such that soldering to a microcomputer mounting foot pattern 3 is achieved not through a pin terminal but through a semicircular edge portion of a semicircular through hole 8a formed in the peripheral surface of a semicircular through-hole board 8, and therefore, the emulator can be mounted on a user target board 1 easily without the need to deform the emulator cable and, further, the area occupied by the microcomputer mounting foot pattern can be decreased.