Abstract:
본 발명은 반도체 메모리 장치의 병렬 비트 테스트 방법 및 병렬 비트 테스트 회로가 제공된다. 본 발명의 일실시예에 따른 반도체 메모리 장치의 병렬 비트 테스트 방법은 다수의 메모리 셀로부터 독출된 다수의 데이터를 제 1 테스트 모드로 테스트하거나, 다수의 메모리 셀로부터 독출된 다수의 데이터를 제 2 테스트 모드로 테스트하는 단계 및 제 1 테스트 모드의 출력과 제 2 테스트 모드의 출력을 확인하는 단계를 포함한다.
Abstract:
A method and circuit for controlling a write recovery time in a semiconductor memory device are provided to minimize a clock noise by restricting an enable period of a control signal within a substantial recovery period. A circuit for controlling a write recovery time in a semiconductor memory device includes a start signal generator(110), a counter(120), an end signal generator(130), and a control signal generator(140). The start time generator generates a write recovery start signal corresponding to an input timing of last data, which is delayed from an automatic precharge write command input timing. The counter is enabled by a write recovery time control signal and counts a clock signal. The end time generator combines outputs signals of the counter and generates a write recovery time end signal. The control signal generator generates the write recovery time control signal, whose enable period is determined in response to the start and end signals.
Abstract:
본 발명은 반도체 메모리 장치를 공개한다. 이 반도체 메모리 장치는 테스트 제어 신호와 테스트 할 메모리 셀 어레이 블록을 선택하기 위한 테스트 제어 신호와 테스트 할 메모리 셀 어레이 블록을 선택하기 위한 테스트 어드레스 신호를 제공하는 테스트 제어 수단과, 테스트 모드인 경우에는, 상기 테스트 어드레스 신호를 디코딩하여 블록 선택 신호를 발생하고, 일반 모드인 경우에는 로우 어드레스 신호를 디코딩하여 블록 선택 신호를 발생하는 블록 선택 디코더를 구비하는 것을 특징으로 한다. 따라서 장치는 MRS(Mode Register Set)을 이용하여 테스트 모드를 선택하고, 반도체 메모리 장치가 테스트 모드로 선택된 경우에는 MRS(Mode Register Set)에서 제공하는 테스트 어드레스 신호를 이용하여 성능 테스트를 수행할 특정 메모리 셀 어레이 블록만을 인에이블할 수 있도록 하여, 테스트 시간을 획기적을 단축시켜 줄 수 있도록 한다.
Abstract:
PURPOSE: A semiconductor memory device capable of improving a write/read frequency in a write interrupt mode is provided to prevent the decrease of the write/read frequency in the write interrupt mode. CONSTITUTION: According to the semiconductor memory device(100), a memory cell array(110) includes memory cells arranged in a plurality of rows and in a plurality of columns. A write interrupt detection circuit(120) detects whether a write operation is performed after a write operation or a read operation is performed after a write operation, and outputs a control signal(PWICSL) as the detection result. A CSL disable circuit(130) outputs a CSL disable signal(PCSLDB) in response to the control signal from the write interrupt detection circuit. A CSL driver circuit(140) disables a column selection line enabled in response to the CSL disable signal from the CSL disable circuit.
Abstract:
PURPOSE: A semiconductor memory device is provided to transfer a voltage, which is lower than a pre-charged level of voltage in a global input-output line pair, to bit-lines by reducing a voltage applied to a local global input-output gate. CONSTITUTION: A memory cell array(10) includes a plurality of memory cells connected between each word-lines and bit-line pairs. A bit-line selection unit transfer data between selected bit-line pair from the bit-line pairs and local input-output pairs in response with a column selection signal. A local global input-output gate unit(40) transfers data between the local input-output line pairs and global input-output line pairs. A controller(70) drives the word-lines in response with an address signal and a command. The controller activates the column selection signal with a first voltage.
Abstract:
A semiconductor memory device with split bank structure and a data input/output method thereof are provided to improve performance of the semiconductor memory device by changing bank structure and arrangement of an I/O sense amplifier of the semiconductor memory device. A memory bank(210) comprises a first sub-bank(220) and a second sub-bank(225). An internal input/output sense amplifier part(230) is located between the first sub-bank and the second sub-bank. An external input/output sense amplifier part(240) is located on the opposite side of the internal input/output sense amplifier of the second sub-bank. A plurality of first input/output lines(250) connects the internal input/output sense amplifier part and memory cells in the first sub-bank. A plurality of second input/output lines(291) connects the internal input/output sense amplifier part and memory cells in the second sub-bank. A plurality of third input/output lines(260) connects the internal input/output sense amplifier part and the external input/output sense amplifier part. The data of the memory cell in the first sub-bank is transmitted to the internal input/output sense amplifier part through the first input/output line, and is transmitted to the external input/output sense amplifier part through the third input/output line.
Abstract:
A CAS latency circuit and a semiconductor memory device having the same are provided to generate a stable CAS latency signal in a high speed semiconductor memory device, regardless of the variation of PVT(Process, Voltage, Temperature) or using an external clock with high frequency. An internal read command signal generation part(110) generates an internal read command signal(PREAD) in response to a read command. A latency clock signal generation part(120) generates a plurality of latency clock signals. A latency signal generation part(130) receives the internal read command signal and the latency control clocks, and generates a latency signal by shifting the internal read command signal. The latency control clock generation part generates at least one first latency control clock having a constant margin to the internal read command signal by using a PREAD replica.
Abstract:
A column selection line generation circuit in a semiconductor memory device is provided to improve operation speed of the semiconductor memory device, by advancing enabling time of a column selection line during a normal operation. In a column selection line generation circuit of a semiconductor memory device generating a column selection signal for controlling the electrical connection between a specific bit line and a data input/output line, a decoding part(300) is enabled in response to a column selection line enable signal and generates an output signal responding to a column address specifying the bit line. A driving part(400) is driven to enable the column selection line in response to an output signal of the decoding part, and is disabled in response to the enabling of a repair signal so as to prevent the enabling of the column selection line.