摘要:
A semiconductor memory device having a self-refresh operation includes a detection circuit generating a detection signal when detecting a change of a given input signal, and a comparator circuit comparing the detection signal with a refresh request signal internally generated and generating a control signal indicative of a circuit operation.
摘要:
There is provided a semiconductor device including: a temperature sensor detecting temperature; an inner circuit operating when supplied with a power supply voltage from a power supply line; a switch connected between the power supply line and the inner circuit; and a control circuit performing control in which, in a case where the temperature detected by the temperature sensor is higher than a threshold value, the switch is turned on when the inner circuit is in operation and the switch is turned off when the inner circuit is in non-operation, and in a case where the temperature detected by the temperature sensor is lower than the threshold value, the switch is turned on when the inner circuit is in operation and in non-operation.
摘要:
There is provided a semiconductor device including: a temperature sensor detecting temperature; an inner circuit operating when supplied with a power supply voltage from a power supply line; a switch connected between the power supply line and the inner circuit; and a control circuit performing control in which, in a case where the temperature detected by the temperature sensor is higher than a threshold value, the switch is turned on when the inner circuit is in operation and the switch is turned off when the inner circuit is in non-operation, and in a case where the temperature detected by the temperature sensor is lower than the threshold value, the switch is turned on when the inner circuit is in operation and in non-operation.
摘要:
A semiconductor memory device having a self-refresh operation includes a first circuit generating a first signal that specifies a first self-refresh cycle by a non-volatile circuit element provided in the semiconductor memory device, a second circuit receiving a second signal that specifies a second self-refresh cycle via a terminal that is used in common to another signal, and a third circuit generating a pulse signal having one of the first and second self-refresh cycles, the pulse signal being related to the self-refresh operation.
摘要:
A semiconductor memory device includes an SRAM provided on a chip, the SRAM including an SRAM cell array. A DRAM is provided on the chip, the DRAM including a DRAM cell array. An address input circuit receives an address signal, the address signal having a first portion and a second portion, the first portion carrying a unique value of row-column address information provided to access one of memory locations in one of the SRAM and DRAM cell arrays, the second portion carrying a unique value of SRAM/DRAM address information provided to select one of the SRAM and the DRAM.
摘要:
A semiconductor memory device, such as a DRAM, which needs to be refreshed for retaining data, is provided with a storing portion for storing data therein, and a busy signal outputting portion outputting a busy signal during the refresh operation.
摘要:
A semiconductor memory device includes an SRAM provided on a chip, the SRAM including an SRAM cell array. A DRAM is provided on the chip, the DRAM including a DRAM cell array. An address input circuit receives an address signal, the address signal having a first portion and a second portion, the first portion carrying a unique value of row-column address information provided to access one of memory locations in one of the SRAM and DRAM cell arrays, the second portion carrying a unique value of SRAM/DRAM address information provided to select one of the SRAM and the DRAM.
摘要:
A semiconductor memory device, such as a DRAM, which needs to be refreshed for retaining data, is provided with a storing portion for storing data therein, and a busy signal outputting portion outputting a busy signal during the refresh operation.
摘要:
A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.
摘要:
A semiconductor storage device conducts a late-write operation. The semiconductor storage device comprises: a memory core circuit storing data; a data latch circuit storing preceding data corresponding to a preceding write-operation; an address compare circuit comparing a preceding address corresponding to the preceding write-operation and a present address corresponding to a present read-operation so as to determine whether the preceding address and the present address match each other; and a control circuit. The control circuit controls a test read-operation to read data from the memory core circuit regardless of whether the preceding address and the present address match each other.