摘要:
A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.
摘要:
A watch don timer comprising a reload register 2 and a shift register 3 is disclosed. In the case where an object to be monitored is operating normally, a circuit 43 is supplied with as a reload request signal the rising timing of a monitor signal changing cyclically, which is reloaded from the reload register 2 of the shift, register 3 in synchronism with a reload request signal in accordance with the value of data located in each bit of the shift register 3. Circuits 41, 42 are adapted to detect an abnormal condition in the case where a reload request signal is given in a cycle shorter or longer than a predetermined cycle of reloading. This configuration realizes a watch dog timer with a comparatively small scale of circuit configuration in which the pulse width of the input signal is monitored, the cycle detected and the execution of a plurality of instructions monitored, while at the same time having a programmable width and cycle and a tolerable range thereof.
摘要:
A multiprocessor-type one-chip microcomputer, of the type having a plurality of processors, each having a separate address space, a plurality of programmable ROMs, for storing program data for each processor, and a set of functional terminals, with the microcomputer including a common writing bus and a control means for coupling either the common writing bus or a set of functional lines to the functional terminals based on the setting of a mode setting signal. During normal operations the functional lines are coupled to the functional terminals and each programmable ROM is accessed by a processor using addresses in the address space of the processor. When new instruction data is to be written to the programmable ROMs, the common writing bus is coupled to the functional terminals and instruction data is written to the programmable ROMs using addresses in a common address space.
摘要:
A dual port memory 50 comprises two decoders 9a, 9b, and two sense amplifiers 14a, 14b, associated with a memory cell array 100. The dual port memory 50 can be accessed by a CPU 6 of the A system side and a CPU 7 of the B system side simultaneously. The occurrence of contention between the accesses of CPUs 6 and 7 with respect to the same memory cell is detected by an access contention detecting circuit 51. In response to contention detection, a control signal generating circuit 52 generates various control signals. The A port side and B port side of the dual port memory 50 each is provided with write data latches 53a, 53b, read data latches 54a, 54b, switches 55a-57b, select switches 58a, 58b, and tri-state buffers 59a and 59b, respectively, to perform arbitration all the time of access contention, in accordance with the control signal from control signal generating circuit 52.
摘要:
The microcomputer of the invention comprises a flip-flop which repeats setting and resetting of a monitor signal. The monitor signal is delivered from an external device in response to a PWM output signal for driving the external device. The flip-flop sets and resets at the front edge, of the monitor signal. The invention detects a failure of the external device according to the presence or absence of inversion of its held value. Hence, the failure of the external device operating at high speeds can be reliably detected by the microcomputer of the invention.
摘要:
A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.
摘要:
Disclosed is a bearing structure of a sliding bearing which is held in a housing and which rotatably supports a rotary shaft. At least one of the outer surface of the sliding bearing and the inner surface of the housing is covered with a coating layer which essentially consists of, by weight, a total amount of not more than 90% of solid lubricant and hard particles in which the solid lubricant is of 3 to 50% and the hard particles are of 1 to 50%, and the balance of polyamideimide resin.
摘要:
A multi-port RAM has a decoding portion for decoding a plurality of specific addresses for generating interruptions and a selection circuit for selecting some addresses from among the plurality of specific addresses. Since the plurality of addresses are selected for generating interruptions in parallel or in the sequence of time for each generation of an interruption, the data processing capability at the time of generation of interruptions can be improved.
摘要:
A dielectrically isolated substrate is comprised of a single-crystal silicon substrate or bond substrate and a single-crystal silicon substrate or base substrate bonded together into a composite structure. The bond substrate has a (110) plane as a main crystal plane and is provided with vertically walled moats and substantially squared islands positioned adjacent to the moats. The moats and islands result from anisotropic etching using a specific mask pattern. Also disclosed is a process for producing the composite structure.
摘要:
A microcomputer with a built-in flash memory is obtained in which the flash memory can be properly rewritten with a rewrite program kept placed on the flash memory and without requiring additional complicated control circuitry. On accepting an erase/write command which constitutes a rewrite command, a flash memory module (2) outputs to a flash memory control circuit (3) a ready status signal RYIBY indicative of a busy state during execution of the series of processing. When the ready status signal RYIBY indicates the busy state, the flash memory control circuit (3) outputs a hold signal HOLD at active “H,” in order to inhibit a CPU (1) from accessing the flash memory module (2). When the ready status signal RYIBY has recovered the ready state, the flash memory control circuit (3) outputs the hold signal HOLD at “L” to allow the CPU (1) to access the flash memory module (2).