Abstract: A swiveling work machine includes a traveling apparatus, a swivel base mounted on the traveling apparatus to be pivotable about a vertical axis, a hood disposed at a rear portion of the swivel base, the hood accommodating therein an engine, a support frame being disposed across over the engine, and a ROPS having a front end thereof fixed to the swivel base and a rear end thereof fixed to an upper portion of the support frame. The support frame includes a front leg member disposed on one lateral side of the ROPS, the front leg member extending to vicinity of a position forwardly of the swivel base.

Abstract: A swivel work machine includes a traveling unit, a swivel base plate supported on the traveling unit to be pivotable about a vertical swivel axis, the swivel base plate having a first lateral side and a second lateral side provided across said vertical axis, a pair of upper and lower support brackets disposed at a front end of the swivel base plate with an offset toward the first lateral side and adapted for supporting an implement, a pair of left and right vertical ribs extending rearward from the support brackets and fixed to the swivel base plate and a cabin mounted on the swivel base plate. The cabin is disposed with an offset toward the second lateral side relative to the support brackets, a bottom of the cabin being disposed downwardly of the upper support bracket. The vertical rib disposed on the side of the second lateral side extends, from its front portion to its intermediate portion, parallel with a side face of the cabin on the side of the first lateral side.

Abstract: A swiveling work machine includes a swivel deck mounted to be pivotable about a vertical axis and a side cover for covering one lateral side on the swivel deck, an accommodating space capable of accommodating a work machine accessory being provided inside the lateral cover. The accommodating space accommodates, as the implement accessory, a work oil tank, a fuel tank and a control valve unit. The work oil tank is disposed at a fore-and-aft intermediate portion on one lateral side on the swivel deck. The fuel tank is disposed forwardly of the work oil tank with forming a gap relative thereto. The control valve unit is disposed upwardly of the fuel tank and longitudinally along the fore/aft direction.

Abstract: An inertia sensor unit having a detecting element, a signal processor being constituted as an element separate from the detecting element, for at least amplifying signals output from the detecting element, and an inertia sensor mounted to a detection object for detecting acceleration or angular velocity of the detection object as an inertial force of the detection object to output electrical signals changing according to the inertial force, includes: a first temperature detecting element for detecting the temperature of the signal processor, a second temperature detecting element for detecting the temperature of the detecting element directly or indirectly, and a correcting processor for correcting the signals output from the inertia sensor based on the result detected by the first temperature detecting element and the second temperature detecting element.

Abstract: A swiveling work machine includes a traveling apparatus, a swivel base mounted on the traveling apparatus to be pivotable about a vertical axis, a hood disposed at a rear portion of the swivel base, the hood accommodating therein an engine, a support frame being disposed across over the engine, and a ROPS having a front end thereof fixed to the swivel base and a rear end thereof fixed to an upper portion of the support frame. The support frame includes a front leg member disposed on one lateral side of the ROPS, the front leg member extending to vicinity of a position forwardly of the swivel base.

Abstract: A swivel work machine includes a traveling unit, a swivel base plate supported on the traveling unit to be pivotable about a vertical swivel axis, the swivel base plate having a first lateral side and a second lateral side provided across said vertical axis, a pair of upper and lower support brackets disposed at a front end of the swivel base plate with an offset toward the first lateral side and adapted for supporting an implement, a pair of left and right vertical ribs extending rearward from the support brackets and fixed to the swivel base plate and a cabin mounted on the swivel base plate. The cabin is disposed with an offset toward the second lateral side relative to the support brackets, a bottom of the cabin being disposed downwardly of the upper support bracket. The vertical rib disposed on the side of the second lateral side extends, from its front portion to its intermediate portion, parallel with a side face of the cabin on the side of the first lateral side.

Abstract: A swiveling work machine includes a swivel deck mounted to be pivotable about a vertical axis and a side cover for covering one lateral side on the swivel deck, an accommodating space capable of accommodating a work machine accessory being provided inside the lateral cover. The accommodating space accommodates, as the implement accessory, a work oil tank, a fuel tank and a control valve unit. The work oil tank is disposed at a fore-and-aft intermediate portion on one lateral side on the swivel deck. The fuel tank is disposed forwardly of the work oil tank with forming a gap relative thereto. The control valve unit is disposed upwardly of the fuel tank and longitudinally along the fore/aft direction.

Abstract: An inertia sensor unit having a detecting element, a signal processor being constituted as an element separate from the detecting element, for at least amplifying signals output from the detecting element, and an inertia sensor mounted to a detection object for detecting acceleration or angular velocity of the detection object as an inertial force of the detection object to output electrical signals changing according to the inertial force, includes: a first temperature detecting means for detecting the temperature of the signal processor, a second temperature detecting means for detecting the temperature of the detecting element directly or indirectly, and a correcting means for correcting the signals output from the inertia sensor based on the result detected by the first temperature detecting means and the second temperature detecting means.

Abstract: A buffer circuit which can solve a problem of a conventional buffer circuit in that high speed data transfer is hindered because of parasitic capacitance of signal lines, which has an affect on the discharge time of inverters in a latch circuit of the buffer circuit, when the buffer circuit changes its state from a first term (non-transfer mode) to a second term (transfer mode). The buffer circuit solves this problem by pouring a current, which flows thereinto from a first signal line, into ground through a first PMOS transistor, a first NMOS transistor and a third NMOS transistor, and by pouring a current, which flows thereinto from a second signal line, into the ground through a second PMOS transistor, a second NMOS transistor and the third NMOS transistor.

Abstract: A data processor which uses a pipeline function to process data reads from an external device which may take two cycles or more. The data processor includes a read buffer register (13) which stores data having been read from an external device by the processing of an external access type instruction word. A latch (16) stores information specifying a register in a register file (4) into which the result of the external access type instruction is stored. A controlling device stores data read from the external device temporarily into the read buffer register (13), and stores the data into a register specified by data stored in the data latch (16).

Abstract: The invention provides a clamping semiconductor circuit in which a first transistor of one conductivity type and a second transistor of another conductivity type are connected in series to each other and interposed between a power supply terminal and a signal line. The second transistor is supplied with a predetermined voltage, thereby allowing a current to flow from a power supply to the signal line. When the voltage of the signal line becomes equal to the predetermined voltage, all the transistors become nonconductive, thereby cutting off an unwanted current flowing from a power supply into the signal line.

Abstract: A memory control device which judges an access mode to a DRAM at a high speed by discriminating whether a row address of a DRAM to be currently accessed is the same as that of the DRAM at the last access in parallel with a translation from a logical page number to a physical page number.

Abstract: A transfer processing procedure comprising instruction words is inputted from an external to a program storing area of a DMA processing unit 40 whose functions are arranged to correspond to instructions, and the DMA processing unit 40 performs a transfer process in accordance with the function corresponding to the inputted instruction word.

Abstract: A one-chip microcomputer having a mode setting circuit 40a in a first MCU 1a and a second MCU 1b for setting either a first evaluation operation mode under which the operations of memory 3a stops and programs and data are read from the outside via terminals 7a, 8a and 9a of a first peripheral device 41a in order to operate a CPU 2a or a second evaluation operation mode under which an operation of the CPU 2a stops and signals are input/output from/to the outside via terminals 12a, 13a, and 14a of a second peripheral device 42a in order to control the first peripheral device 41a, wherein the terminals 7a, 8a and 9a of the first peripheral device 41a of the first MCU 1a are connected to the terminals 12a, 13a and 14a of the second peripheral device 42b of the second MCU 1b and a debug ROM 11. The number of external terminals necessary for program development and evaluation can be decreased and exterior peripheral devices are not needed for program development and evaluation.

Abstract: A latch circuit comprises, as a circuit corresponding to 1 bit, a flip-flop 50 which is composed of a plurality of NAND gates 11a, 11b, and holds a given signal value and outputs the positive logic value to a Q signal line 5a and the negative logic value to a /Q signal line 5b, and a differential amplifying circuit composed of a plurality of P-type FETs and N-type FETs and having a characteristics such that, an input voltage to the flip-flop 50, when the signal to be held is given, starts to fall before the time point when a drop in voltage of either an X signal line 4a or a /X signal line 4b becomes larger than the difference between a source voltage and a threshold voltage of the NAND gates 11a, 11b. The latch circuit is mainly used as internal elements of a data processor, whereby when the signal is inputted, an voltage of the input signal to the flip-flop 50 of the latch circuit approaches to the threshold voltage of the logic gates constituting the flip-flop 50.

Abstract: A microcomputer comprising an internal decoder for addressing instruction codes in an instruction prefetch buffer, a words field provided preferably in a micro ROM for storing number of words which indicate lengths of various instructions, and position calculating means provided in the bus interface unit for inputting the number of words to indicate an address of instruction code in the instruction prefetch buffer, so that the instruction code is read out concurrently with the execution of the micro instruction.

Abstract: A multiplying circuit wherein an adder 7 outputs a value "0" in which both of a positive part and a negative part of a number with a redundant code are "1", and at a last cycle of the multiplication cycles, the finish detecting circuit 13 detects finishing of multiplication cycles by detecting that "1" exists in a portion storing a positive part of a number with a redundant code of the third bit from the lowest bit of the second latch 8 and in a portion storing a negative part of the same at the same time. In such a construction, a counter circuit for counting multiplication cycles according to the Booth algorithm utilizing a number with a redundant code can be omitted. Accordingly, the number of transistors is reduced and the circuit configuration becomes simple.

Abstract: A DRAM control circuit, having a second counter 12 which counts the number of times of generation of a refresh request signal generated by a first timer circuit 100, a set value register 13 which holds the maximum number of reservations for refreshing a DRAM 52, and a second comparator 14 which compares the count value of the counter 12 and a value held by the set value register 13, which cancels high-speed page mode and refreshes the DRAM 52 in a predetermined procedure only at a time when the second comparator 14 detects coincidence between the count value of the second counter 12 and a value held by the set value register 13. This configuration enables it to limit refreshing during high-speed page mode, while achieving a DRAM control circuit capable of operating in high-speed page mode more efficiently.