摘要:
Provided are a nonvolatile memory device and a driving method thereof. In the method of driving a nonvolatile memory device, a structural shape and position of a memory cell to be driven is determined, and then the memory cell is driven with an optimized operating condition according to a distribution of the memory cell using a determination result.
摘要:
A Silicon-Controlled Rectifier (SCR) for Electrostatic Discharge (ESD) protection includes an isolation device. The isolation device isolates a main ground voltage line, connected to a first cathode, from a peripheral ground voltage line, connected to a second cathode. As result, even when noise occurs in the peripheral ground voltage line during the operation of an integrated circuit, the main ground voltage line maintains a stable voltage level.
摘要:
A flash memory device comprises a plurality of memory blocks. A selected memory block among the plurality of memory blocks includes 2n pages of data. The selected memory block includes different types of memory cells capable of storing different numbers of bits.
摘要:
Methods for setting a read voltage in a memory system which comprises a flash memory device and a memory controller for controlling the flash memory device, comprise sequentially varying a distribution read voltage to read page data from the flash memory device; constituting a distribution table having a data bit number and a distribution read voltage, the data bit number indicating an erase state among the page data respectively read from the flash memory device and the distribution read voltage corresponding to the read page data; detecting distribution read voltages corresponding to data bit numbers each indicating maximum points of possible cell states of a memory cell, based on the distribution table; and defining new read voltages based on the detected distribution read voltages.
摘要:
There is provided a flash memory device with multi-level cell and a reading and programming method thereof. The flash memory device with multi-level cell includes a memory cell array, a unit for precharging bit line, a bit line voltage supply circuit for supplying a voltage to the bit line, and first to third latch circuits each of which performs different function from each other. The reading and programming methods are performed by LSB and MSB reading and programming operations. A reading method in the memory device is achieved by reading an LSB two times and by reading an MSB one time. A programming method is achieved by programming an LSB one time and programming an MSB one time. Data having multi-levels can be programmed into memory cells by two times programming operations.
摘要:
According to some embodiments, a nonvolatile semiconductor memory device includes high voltage circuits that prevent high voltages, which are applied to bitlines during an erase operation, from being applied to low voltage circuits that are operable with low voltages. Each high voltage circuit includes a first switching circuit for selectively isolating the low voltage circuit from the bitlines, and a second switching circuit for inhibiting a leakage current to the low voltage circuit from the bitlines. The second switching circuit is connected between the first switching circuit and the low voltage circuit.
摘要:
Provided is a memory device with a shared open bit line sense amplifier architecture. The memory device includes memory cell arrays, each memory cell array including bit lines, and a sense amplifier configured to couple to at least two bit lines a memory cell array and configured to couple to at least two bit lines of a different memory cell array.
摘要:
There is provided a flash memory device with multi-level cell and a reading and programming method thereof. The flash memory device with multi-level cell includes a memory cell array, a unit for precharging bit line, a bit line voltage supply circuit for supplying a voltage to the bit line, and first to third latch circuits each of which performs different function from each other. The reading and programming methods are performed by LSB and MSB reading and programming operations. A reading method in the memory device is achieved by reading an LSB two times and by reading an MSB one time. A programming method is achieved by programming an LSB one time and programming an MSB one time. Data having multi-levels can be programmed into memory cells by two times programming operations.
摘要:
A NAND flash memory device is provided. The memory device includes M input/output pins for inputting and outputting M-bit data (M is any natural number), first and second input buffer circuits, an address register, a command register, and a data input register. The first and second input buffer circuits receive N least significant bits (N is any natural number) and N most significant bits, respectively, of the M-bit data inputted via the input/output pins. The address register receives as an address an output of the first input buffer circuit in response to address load signals. The command register receives as a command an output of the first address buffer circuit in response to the command load signal. The data input register simultaneously receives outputs of the first and second input buffer circuits in response to the data load signal, as data to be programmed. The M-bit data latched in the data input register is loaded on the sense and latch block via a data bus. According to these configurations of the NAND flash memory device, at each of modes of operation where a command, an address, and data are serially received, the data is inputted and outputted through all of the M input/output pins, while each of the command and the address is inputted through N least significant bit input/output pins.
摘要:
There is provided a flash memory device with multi-level cell and a reading and programming method thereof. The flash memory device with multi-level cell includes a memory cell array, a unit for precharging bit line, a bit line voltage supply circuit for supplying a voltage to the bit line, and first to third latch circuits each of which performs different function from each other. The reading and programming methods are performed by LSB and MSB reading and programming operations. A reading method in the memory device is achieved by reading an LSB two times and by reading an MSB one time. A programming method is achieved by programming an LSB one time and programming an MSB one time. Data having multi-levels can be programmed into memory cells by two times programming operations.