Abstract:
In a DRAM of separated I/O type, column selecting lines for reading data and column selecting lines for writing data are provided independently from each other. An addition circuit is provided corresponding to each memory cell array block for precharging, when that memory cell array is not selected, a read line pair corresponding that memory cell array block to the same potential Vb1 as that of the bit lines equalized by an equalizer circuit. Both in data reading and writing operations, current does not flow between any equalizer circuit and the write data line pair provided corresponding to each unselected memory cell array block in spite of the fact that a transistor for write selection is not provided in each bit line pair.
Abstract:
In a dynamic random access memory (DRAM), there is provided a refresh decision circuit which detects the external designation of a self refresh mode, in addition to a CAS before RAS refresh mode, by RAS and CAS signals. By detecting a time period of one cycle of the RAS, the self refresh mode is determined. As a result, the timing of change of the RAS signal is less restricted.
Abstract:
A dynamic random access memory device includes a pair of write-in data transferring buses for transferring data to be written, a pair of read-out data transferring buses for transferring data to be read provided additionally and separately from the write-in data transferring bus pair and a plurality of current mirror type sense amplifiers formed of CMOS transistors and each amplifier being provided between a bit line pair and the read-out data transferring bus pair and having input nodes connected to the corresponding bit line pair and the read-out data transferring bus pair forming output nodes thereof. The current mirror type sense amplifiers of CMOS transistors are activated in response to an output of a column decoder at earlier time than the time when conventional flip-flop type sense amplifiers are activated.
Abstract:
There is disclosed a dynamic random access memory device of the type capable of periodic self-refresh cycles of operation. The DRAM includes the detector circuit for detecting the designation of the self-refresh mode and a voltage generator circuit for generating a voltage to precharge the bit line pair. During the self-controlled refresh cycle, the bit line pair is equalized and precharged to a voltage lower than Vcc/2. When it is attempted to set the time interval between the self-refresh cycles in order to reduce current consumption, the level of voltage stored in the memory cell capacitor tends to decrease due to charge leakage. However, it is implemented to provide and keep a potential difference between the precharge voltage on the bit line pair and the voltage stored in the capacitor thereby to secure the desired sensing margin for the sense amplifier.
Abstract:
A memory cell array is divided into four blocks #1 to #4. The blocks #1 and #3 are operated when a row address signal RA.sub.8 equals "0". The blocks #2 and #4 are operated when the row address signal RA.sub.8 equals "1". A spare row sub-decoder is provided in each of the blocks. Spare row sub-decoders in the blocks #1 and #2 are connected to a spare row main decoder through a single spare decoder selecting line. The spare row sub-decoders in the blocks #2 and #4 are connected to the other spare row main decoder through another spare decoder selecting line. The spare main decoders are responsive to the row address signal RA.sub.8 and row address signals RA.sub.2, RA.sub.2, . . . , RA.sub.7, RA.sub.7 for operating a spare row sub-decoder in a block which is in the operating state.
Abstract:
A MOS dynamic type RAM comprises memory cells (10), dummy cells (11), bit line pairs (BL, BL), word lines (WL), dummy word lines (DWL) and sense amplifiers (12). In a non-active cycle, the potentials of each pair of bit lines (BL, BL) are precharged at 1/2 of a supply potential V.sub.CC. Each sense amplifier (12) operates in an active cycle following the non-active cycle, while each active pull-up circuit (13) pulls up the potential of a higher level one of the pair of bit lines to V.sub.CC. This active cycle is defined by an internal RAS internal signal, which is generated by a NAND circuit (27) in response to an external RAS signal and an RPW signal obtained by delaying the external RAS signal by a delay circuit (20) and having a trailing edge obtained by delaying the trailing edge of the external RAS signal by a prescribed period.
Abstract:
The present invention concerns a vehicle including a fuel tank, an engine to which fuel is supplied from the fuel tank, and a control device. The control device is characterized by notifying a refueling instruction corresponding to a use history of the vehicle. According to the present invention, the supply of extra fuel that can be degraded in the fuel tank can be prevented since a necessary refueling instruction is notified in accordance with the use history of the vehicle.
Abstract:
A vehicle surroundings monitoring apparatus includes: a plurality of imaging units which capture an external region of a present-vehicle and output images; a display unit which is installed in an interior of the present-vehicle; a selector which selects an image to be displayed on the display unit from the images output from the imaging units; and a display control unit which displays the images output from the imaging units on the display unit so as to be switched in accordance with a selection by the selector and displays an image indicator display indicating a display region in the external region of the present-vehicle corresponding to the images so as to be switched by the selector on the display unit.
Abstract:
A communication apparatus having a temporary managing portion for controlling a temporary memory, a main managing portion for controlling a main memory and an operation control portion. The operation control portion causes the temporary managing portion and the main managing portion to utilize the state information or the history and state information for obtaining probability of deletion or transmission and probability of delay with regard to each data frame of framed data for discharge and to control, on the basis of the obtained probability of deletion or transmission and the obtained probability of delay, deletion or transmission of the data frame of the framed data for discharge and delay for transmission of the data frame of the framed data for discharge on the occasion of the transmission thereof.
Abstract:
The vehicle maneuver assistance device includes: a plurality of external environment imaging units; a converter that performs a view point conversion; a display unit provided in an interior of the present-vehicle; a steering angle status value detector which detects status values of the steering angle representing an actual steering angle of the present-vehicle, and outputs a steering angle status value; a display controller that causes the display unit to display the converted image, and, overlaid thereon, a guidance display which assists a parking maneuver of the present-vehicle, wherein the display controller controls the guidance display according to the steering angle status value, so that the guidance display includes: an initial positioning guide line representing an initial location of the present-vehicle at the beginning of the parking maneuver; and a steering-switching start positioning guide line representing a starting location of a quick steering direction switching.