摘要:
According to one embodiment, a semiconductor memory device includes a memory array, an address counter, an address detecting circuit and a control circuit. The memory array has a plurality of memory cells arranged at crossing positions of word lines and bit lines. The address counter increments an address including a row address and a column address in synchronism with a clock to sequentially output the incremented addresses. The address detecting circuit detects an address previous to an address including a row address to which the row address is switched at the address output from the address counter to output a detection signal. The control circuit performs a precharging operation to the bit lines connected to the memory cells according to the detection signal output from the address detecting circuit.
摘要:
According to one embodiment, a semiconductor memory device includes a first memory, a second memory and a control circuit. The first memory includes a first bank number. The second memory includes a second bank number larger than the first bank number. The control circuit controls a precharge operation with respect to bit lines provided in the first and second memories. When performing, with respect to the first memory, a synchronous operation that is effected in synchronization with a clock, the control circuit changes over a second precharge operation to an operation time different from a first precharge operation during a period from the end of the initial first precharge operation to the start of the subsequent second precharge operation after receiving an address.
摘要:
A semiconductor memory device includes a memory cell array, an output buffer circuit and an input buffer circuit. The memory cell array includes a plurality of memory cells holding data. The output buffer circuit outputs data read from the memory cells. The input buffer circuit receives an address signal for the memory cells and includes a noise filter to remove noise. The filter length of the noise filter is variable according to the output capability of the data in the output buffer circuit.
摘要:
A semiconductor memory device includes a memory cell array, an output buffer circuit and an input buffer circuit. The memory cell array includes a plurality of memory cells holding data. The output buffer circuit outputs data read from the memory cells. The input buffer circuit receives an address signal for the memory cells and includes a noise filter to remove noise. The filter length of the noise filter is variable according to the output capability of the data in the output buffer circuit.
摘要:
A semiconductor memory device is adapted for storing, as a unit of memory information, multiple-bit data constituted by signal data comprised of bit data of 2.sup.n bits (n is a natural number) and remainder data comprised of bit data of C bits (C is a natural number, C