摘要:
A semiconductor device comprising a plurality of semiconductor chips and a plurality of through-line groups is disclosed. Each of the through-line groups consists of a unique number of through-lines. The numbers associated with the through-line groups are mutually coprime to each other. When one of the through-lines is selected for the each through-line group, one of the semiconductor chip is designated by a combination of the selected through-lines of the plurality of the through-line groups.
摘要:
A stacked memory comprises one or more memory core chips and a fuse chip. Each of the memory core chips has a memory cell array including spare memory cells for replacing defective memory cells. The fuse chip has a fuse unit including a plurality of fuse elements whose electrical cut state corresponding to a replacement with the spare memory cells can be set. Also the fuse chip has a redundancy cell control circuit for controlling a redundancy cell operation of the defective memory cells based on state information of the fuse unit.
摘要:
In a three-dimensional semiconductor device in which a plurality of semiconductor circuit chips are stacked and that is provided with a plurality of interchip interconnections for signal transmission between these semiconductor circuit chips, when transmitting signals, only one interchip interconnection that serves for signal transmission is selected and other interchip interconnections are electrically isolated by means of switches that are provided between the interchip interconnections and signal lines. Interchip interconnection capacitance relating to the charge and discharge of interconnections is thus minimized.
摘要:
A memory module has a plurality of DRAMs (115), which share a bus line, on the front surface and the back surface of a board. The bus line is connected through a via hole (113) from a terminal (111) to one end of a strip line (112), and the other end of the strip line is connected to a strip line in the other layer through a via hole (119) provided for looping back the line. A termination resistor (120), provided near a termination voltage terminal (VTT), is connected to the looped-back strip line in the other layer through a via hole. The DRAM terminals are connected to the strip line each through a via hole. This memory module is mounted on a motherboard, on which a memory controller is provided, through a connector. The effective characteristic impedance of the bus line is matched with the characteristic impedance of the line in the motherboard.
摘要:
A semiconductor device comprising a plurality of semiconductor chips and a plurality of through-line groups is disclosed. Each of the through-line groups consists of a unique number of through-lines. The numbers associated with the through-line groups are mutually coprime to each other. When one of the through-lines is selected for the each through-line group, one of the semiconductor chip is designated by a combination of the selected through-lines of the plurality of the through-line groups.
摘要:
A semiconductor memory device includes a core chip having at least memory cells formed in the core chip, an interface chip having at least peripheral circuits of the memory cells formed in the interface chip, and an external terminal group. The external terminal group includes at least a core power supply terminal that is connected to an internal circuit of the core chip without being connected to an internal circuit of the interface chip, and an interface power supply terminal that is connected to an internal circuit of the interface chip without being connected to the internal circuit of the core chip. With this arrangement, mutually different operation voltages that are optimum for both chips can be given to these chips.
摘要:
A memory module comprises a stab resistor between a pin and one end of a bus. A plurality of memory chips is connected to the bus between both ends thereof. A terminating resistor is connected to the other end of the bus. Stab resistance Rs of the stab resistor and terminating resistance Rterm of the terminating resistor are given by: Rs=(N−1)×Zeffdimm/N, and Rterm=Zeffdimm where N represents the number of the memory modules in a memory system; and Zeffdimm, effective impedance of a memory chip arrangement portion consisting of the bus and the memory chips. In the memory system, the memory modules are connected to a memory controller on a motherboard in a stab connection style. Wiring impedance Zmb of the motherboard is given by: Zmb=(2N−1)×Zeffdimm/N2.
摘要:
A maximum value of the number of mounted memory devices is assumed, and a value of an external delay replica is fixed and set. A desired frequency band is divided into a plurality of sub-frequency bands, and delay times of an output buffer and an internal delay replica are switched and used every sub-frequency band, thereby setting an actual maximum value and an actual minimum value to the internal delay replica. A selecting pin can select the delay time in the internal delay replica. Thus, it is possible to sufficiently ensure a set-up time and a hold time of an internal clock signal generated by a delay locked loop circuit in the latch operation in a register within a desired frequency band and with a permittable number of memory devices, irrespective of the frequency level and the number of mounted memory devices.
摘要:
First and second pre-processing flip-flops latch a command/address signal inputted to a register by a clock having a frequency of ½ of an external clock signal and an inverse clock thereof. Thus, the command/address signal is decomprossed to a set of signals which temporarily has two times. For example, one of the set of signals has only data contents of an odd-th command/address signal, and the other has only data contents of an even-th command/address signal. Since the set of signals has twice periods of the command/address signal, first and second post-processing flip-flop can latch signals in accordance with an internal clock signal generated by a delay locked loop circuit in a state in which a set-up time and a hold time are sufficiently assured.
摘要:
A stacked type semiconductor memory device of having a structure in which a plurality of semiconductor chips is stacked and a desired semiconductor chip can be selected by assigning a plurality of chip identification numbers different from each other are individually assigned to the plurality of semiconductor chips comprising: a plurality of operation circuits which is connected in cascade in a stacking order of the plurality of semiconductor chips and outputs the plurality of identification numbers different from each other by performing a predetermined operation; and a plurality of comparison circuits which detects whether or not each the identification number and a chip selection address commonly connected to each the semiconductor chip are equal to each other by comparing them.