Patent application number | Description | Published |
20130027093 | PLL - One embodiment provides a phase-locked loop (PLL), in which a sequencer controls a loop filter such that, when a signal indicating turning-off of a power supply of the PLL is input thereto, or when a signal indicating turning-on of the power supply of the PLL is input thereto, a resistance value of a first resistance change device in the loop filter is a first resistance value, and that, after the PLL is stabilized, the resistance value of the first resistance change device is a second resistance value which is higher than the first resistance value. | 01-31-2013 |
20130268795 | CACHE SYSTEM AND INFORMATION-PROCESSING DEVICE - According to one embodiment, a cache system includes a tag memory includes a volatile memory device, the tag memory includes ways and storing a tag for each line, a data memory includes a nonvolatile memory device including sense amplifiers for reading data, the data memory includes ways and storing data for each line, a comparison circuit configured to compare a tag included in an address supplied from an external with a tag read from the tag memory, and a controller configured to turn off a power of a sense amplifier for a way which is not accessed based on a comparison result of the comparison circuit. | 10-10-2013 |
20130301345 | MAGNETIC RANDOM ACCESS MEMORY AND MEMORY SYSTEM - According to one embodiment, a magnetic random access memory includes a write circuit to write s-bit (s is a natural number equal to 2 or greater) write data to magnetoresistive elements, and a read circuit to read s-bit read data from the magnetoresistive elements. The control circuit is configured to select one of first and second modes based on a mode selection signal, read the read data by the read circuit and write one of the write data and inversion data of the write data to the magnetoresistive elements by the write circuit based on the read data and the write data if free space of the buffer memory is equal to a fixed value or more when the second mode is selected. | 11-14-2013 |
20130322161 | MAGNETIC RANDOM ACCESS MEMORY - According to one embodiment, a magnetic random access memory includes a write circuit to write complementary data to first and second magnetoresistive elements, and a read circuit to read the complementary data from the first and second magnetoresistive elements. The control circuit is configured to change the first and second bit lines to a floating state after setting the first and second bit lines to a first potential, and change a potential of the first bit line in the floating state to a first value in accordance with a resistance value of the first magnetoresistive element and a potential of the second bit line in the floating state to a second value in accordance with a resistance value of the second magnetoresistive element by setting the common source line to a second potential higher than the first potential. | 12-05-2013 |
20140104920 | SEMICONDUCTOR DEVICE - According to one embodiment, a semiconductor device includes a processor chip, and a memory chip stacked on the processor chip with bumps and including a memory cell unit and a memory logic unit. The bumps are arranged on the memory logic unit. An address and data are transferred between the processor chip and the memory chip by use of shared bumps of the bumps. | 04-17-2014 |
20140281189 | PROCESSOR SYSTEM HAVING VARIABLE CAPACITY MEMORY - According to one embodiment, a processor system includes a variable capacity memory. The memory includes a memory cell array including basic units, each of the basic units including one cell transistor and one variable resistance element, a mode selector switching between first and second modes, a read/write of one bit executed in 2 | 09-18-2014 |
20140293685 | MAGNETIC MEMORY - A magnetic memory according to an embodiment includes: a plurality of memory cells, each memory cell including a first MTJ element and a first selection unit; a pair of a first and second bit lines provided to each column of the memory cells; a word line provided to each row of the memory cells; an equalizer circuit provided to each column of the memory cells, and to connect between the first and second bit lines; and a control circuit that sets the first and second bit lines connected to a selected memory cell to be a first and second potentials to conduct a write operation, and after the write operation, transmits a control signal to the equalizer circuit between the first and second bit lines to activate the equalizer circuit to equalize potentials of the first bit line and the second bit line, thereby bringing into floating states. | 10-02-2014 |
20140339616 | NON-VOLATILE MEMORY, WRITING METHOD FOR THE SAME, AND READING METHOD FOR THE SAME - A non-volatile memory of an embodiment includes a plurality of memory cells, each of the memory cells including a plurality of transistors including a first to fourth transistors, a first non-volatile element, a second non-volatile element, a first node, and a second node, the first and second transistors being connected in series with the first non-volatile element, the third and fourth transistors being connected in series with the second non-volatile element, the first node being disposed between the first and second transistors, the second node being disposed between the third and fourth transistors, gates of the first and third transistors being connected to one of first wiring lines, a gate of the second transistor being connected to the second node, a gate of the fourth transistor being connected to the first node, the first transistor being connected between one of second wiring lines and the first node. | 11-20-2014 |
20140379975 | PROCESSOR - According to one embodiment, a processor includes a core controlling processing data, a cache data area storing the processing data as cache data in a nonvolatile manner, a first tag area storing a tag data of the cache data in a volatile manner, a second tag area storing the tag data in a nonvolatile manner, a tag controller controlling the tag data. The tag controller determines whether the processing data is stored in the cache data area by acquiring the tag data from one of the first and second tag areas. | 12-25-2014 |