摘要:
A memory controller includes a controller input/output circuit configured to output a first command to read first data, and output a second command to read an error corrected portion of the first data. A memory device includes: an error detector, a data storage circuit and an error correction circuit. The error detector is configured to detect a number of error bits in data read from a memory cell in response to a first command. The data storage circuit is configured to store the read data if the detected number of error bits is greater than or equal to a first threshold value. The error correction circuit is configured to correct the stored data.
摘要:
A semiconductor memory device is disclosed. The semiconductor memory device includes a memory array block, a first word line and a second word line. The memory array block includes a plurality of adjacent columns of memory cells, each column of memory cells including a plurality of consecutive memory cells having a plurality of respective consecutive cell transistors that comprise at least a first group of cell transistors and a second group of cell transistors. The first word line is disposed above the plurality of respective consecutive cell transistors and electrically connected to the first group of cell transistors, and the second word line is disposed below the plurality of respective consecutive cell transistors and electrically connected to the second group of cell transistors.
摘要:
A semiconductor memory device includes a cell array including a plurality of regions accessed by first addresses, where the plurality of regions including at least two groups of regions having respectively different memory characteristics. The device further includes a nonvolatile array for nonvolatile storage of group information indicative of which of the least two groups each of the plurality of regions belongs.
摘要:
A semiconductor memory device includes a memory cell and a first reference memory cell. The memory cell includes a first switching element and a first capacitor for storing data. The first switching element is controlled by a first wordline, and has a first terminal connected to a first terminal of the first capacitor and a second terminal connected to a first bitline. The first capacitor has a second terminal for receiving a first plate voltage. The first reference memory cell includes a first reference switching element and a first capacitor. The first switching element is controlled by a first reference wordline, and has a first terminal connected to a first terminal of the first reference capacitor and a second terminal connected to a second bitline. The first reference capacitor has a second terminal receiving a first reference plate voltage different from the first plate voltage.
摘要:
A delay circuit in accordance with the present invention provides high-resolution changes in the time delay by utilizing a slope controller that generates an intermediate signal having sloping edges in response to edges in an input signal. A delay time controller generates an output signal having edges that begin when the level of the intermediate signal reaches a certain level. The overall time delay of the delay circuit can be varied by varying the slope of the edges of the intermediate signal, or by varying the level of the intermediate signal at which the delay time controller begins generating an edge in the output signal, or by varying both parameters. The slope controller and delay time controller can be realized with a plurality of tri-state inverters coupled in parallel for operating responsive to one or more select signals. By implementing the inverters with pull-up and pull-down transistors having different sizes, the overall time delay can be varied with very high resolution.
摘要:
A logic interface circuit and a semiconductor memory device to which the logic interface circuit is applied, the circuit comprising: logic gate means having pull up means and pull down means which respectively responds to one or more input signals to pull up and pull down an output terminal; reverse current preventing means connected between a first supply voltage and the pull up means for preventing current from reversing from the pull up means to the first supply voltage; pre-charging means connected in parallel to the reverse current preventing means for responding to the output signal generated from the output terminal to pre-charge a common point of the reverse current preventing means and the pull up means to the first supply voltage; and reverse current preventing and voltage boosting means connected between the second supply voltage and the output terminal for responding to the first supply voltage to turn off to prevent current from reversing from the output terminal to the second supply voltage if the first supply voltage is higher than the second supply voltage, and for responding to one or more input signals to turn on to set up the output terminal to the second supply voltage if the first supply voltage is lower than the second supply voltage, thereby enabling to shift levels of the supply voltage by adding a simple circuit to logic gates like inverter, NAND gate or NOR gate.
摘要:
A synchronous memory comprises a memory cell array having a plurality of memory cells; a clock control circuit for receiving a first clock signal, a second clock signal, and a third clock signal, and for generating an internal clock signal, a plurality of control signals, and a plurality of flag signals. The memory includes a first register circuit for storing a plurality of input data bits in response to the internal clock signal and to the control signals; a second register circuit for storing the flag signals in response to the internal clock signal and the control signals; a write drive circuit for writing the input data bits passing through the first register circuit into the memory cell array in response to the flag signals during a write cycle; a sense amplifier circuit coupled to the memory cell array, an address comparator circuit for receiving read and write address signals and for generating a first, a second, and a third combination signals; and a switching circuit for transferring the input data bits passing through the first register circuit and the flag signals passing through the second register circuit to output terminals of the device.
摘要:
A semiconductor memory device includes a memory cell and a first reference memory cell. The memory cell includes a first switching element and a first capacitor for storing data. The first switching element is controlled by a first wordline, and has a first terminal connected to a first terminal of the first capacitor and a second terminal connected to a first bitline. The first capacitor has a second terminal for receiving a first plate voltage. The first reference memory cell includes a first reference switching element and a first capacitor. The first switching element is controlled by a first reference wordline, and has a first terminal connected to a first terminal of the first reference capacitor and a second terminal connected to a second bitline. The first reference capacitor has a second terminal receiving a first reference plate voltage different from the first plate voltage.
摘要:
A data line layout includes column selection lines arranged in a first direction at a layer on a memory cell array region, and data lines arranged in the first direction at the layer, the data lines being connected between I/O sense amplifiers and I/O pads.
摘要:
A device includes a memory controller, a memory bus coupled to the memory controller, an internal memory and an external memory connection unit. The internal memory may be directly connected to the memory controller through the memory bus. The external memory connection unit may connect an external memory directly to the memory controller through a portion of signal lines in the memory bus, and may generate a flag signal indicating whether the external memory is connected to the external memory connection unit.