摘要:
There is provided a method of entry of an operation mode of a semiconductor memory during operations without need of any specific timing specification and with effective suppression to any erroneous entry.If read cycles for plural addresses are continued, then a request for entry of operation mode is accepted (steps S1 and S2). In write cycles following to those read cycles, an operation mode to be entered is decided based on data externally designated, wherein in the first write cycle, the kind of the operation mode is set, and then in the next write cycle, conditions for the operation mode are set for the entry of the operation mode of the semiconductor memory.
摘要:
There is provided a method of entry of an operation mode of a semiconductor memory during operations without need of any specific timing specification and with effective suppression to any erroneous entry. If read cycles for plural addresses are continued, then, a request for entry of operation mode is accepted. In write cycles following to those read cycles, an operation mode to be entered is decided based on data externally designated, wherein in the first write cycle, the kind of the operation mode is set, and then in the next write cycle, conditions for the operation mode are set for the entry of the operation mode of the semiconductor memory.
摘要:
A semiconductor storage having the same memory cells as a DRAM, operating in SRAM specifications, and having advantages such as a small chop size, a low power consumption, a low manufacturing cost, no access delay due to skew, and no memory cell breakdown. An ATD circuit (3) generates a one-shot pulse added to an address change detection signal (ATD) from a change of the address (Address) supplied from external. By combining one-shot pulse produced for each bit of the address, only one one-shot pulse is generated even if the address includes skew. A memory cell is refreshed by using a refresh address (R_ADD) generated by a refresh control circuit (4) during the time when a one-shot pulse is generated. At the fall of the one-shot pulse, a latch control signal (LC) is generated, and the address is taken in a latch (2) so as to access a memory cell array (6).
摘要:
There is provided a method of entry of an operation mode of a semiconductor memory during operations without need of any specific timing specification and with effective suppression to any erroneous entry. If read cycles for plural addresses are continued, then a request for entry of operation mode is accepted (steps S1 and S2). In write cycles following to those read cycles, an operation mode to be entered is decided based on data externally designated, wherein in the first write cycle, the kind of the operation mode is set, and then in the next write cycle, conditions for the operation mode are set for the entry of the operation mode of the semiconductor memory.
摘要:
Problems are prevented that a refresh provides an influence to a normal access and that a continuation of write operations inhibits refresh. In a semiconductor memory device, a clock signal providing a reference to a time interval of refresh operations based on addresses corresponding to a single row s generated as a refresh clock signal. A transition of an access address “Address” externally supplied and corresponding to a memory cell is detected, so that a refresh operation is executed to a memory cell corresponding to a refresh address by triggering the generation of this detection signal before an access to a memory cell designated by the access address is made, wherein the upon input of a write enable signal /WE, the refresh is executed by triggering this signal before a write operation is executed and the refresh operation by triggering the generation of the access address is discontinued in a predetermined period of time based on the refresh clock signal.
摘要:
An iris authentication apparatus includes a camera for obtaining the image of an eye; a display panel arranged on the same plane as where the lens of the camera is arranged; and guide character generation means, wherein a guide character is displayed on a display panel, and the eye of a person to be authenticated who watches the guide character is guided. As a result, a satisfactory iris image can be obtained by the iris authentication apparatus of one camera type that does not have a zooming function, so that the iris authentication apparatus that can be mounted to a small body, such as a portable telephone, can be provided.
摘要:
It is an object of the present invention to provide an imaging device that can be reduced in production cost in comparison with the conventional imaging device, and a portable terminal provided with the imaging device. The imaging device 10 comprises a lens 11 for focusing light from an object, a magnet 12 attached to the lens 11, lens moving means 13 for moving the lens 11 along an optical axis of the lens 11, a hall element 14 for detecting a magnetic flax generated by the magnet 12, a constant current circuit 15 for driving the hall element 14, an amplifier 16 for amplifying an output voltage of the hall element 14, a comparator 17 for comparing a reference voltage with the output voltage of the hall element 14, a PWM signal producing unit 18 for producing a pulse width modulation signal, a lens controller 19 for outputting a control signal to the lens moving means 13 to control the lens moving means 13, and a lens driver 20 for driving the lens moving means 13.
摘要:
A semiconductor dynamic RAM for image processing, according to the present invention, comprises a VRAM having logical operation function of performing a predetermined logical operation of an input data signal and an output from a selected one of memory cells and rewriting the selected memory cell with a result of the operation. It includes a write read control circuit including a level determination circuit for determining a level of the input signal under control of the logical operation enable signal. Based on the result of determination of the logical level of the input signal, either write of the input signal to the selected memory cell or refresh of information stored in the selected cell is performed to effectively perform the logical operation.
摘要:
Receipt of an order for a support for transportation in a trade or for documentation in a trade is managed. A control unit of a service management server sends an order receipt information registration screen. In a case where a service pattern is selected on the order receipt information registration screen, the control unit retrieves service plans that constitute the service pattern, and outputs the service plans. Then, the control unit acquires order receipt particulars information about the service plans. Then, the control unit registers order receipt management data. On the other hand, in a case where order receipt information is input in the order receipt information registration screen, the control unit retrieves a service plan that matches the order receipt information, and outputs the service plan.
摘要:
The present invention provides a semiconductor memory circuit which can restrict the increase of an operation current in a flash write mode to a minimum even when there are problems caused in the manufacturing process such as short-circuits in the wiring. A timing control circuit of the semiconductor memory circuit of the present invention comprises an FW latch signal generation circuit and a latch circuit both for detecting that a row address strobe signal, an RAS signal and a flash write enable signal inputted have become active, and an FW gate signal generation circuit for activating the FW gate signal for only a limited fixed time determined by a delay circuit when an FW gate activation signal is outputted from the latch circuit which has detected the activation of both signals. With the FW gate signal activated, the flash write gate switch turns active for performing the flash write activity. After the flash write activity is finished, the FW gate signal becomes inactive immediately even when the RAS signal is active.