摘要:
A memory controller connected to memory includes: an address reception unit for receiving an address code externally input together with a command; and a command conversion unit for outputting to the memory an MRS command to change the internal settings of the memory based on the address code when the address code input together with a first command specifies an address space for which the memory is not implemented.
摘要:
The data memory cell array and parity memory cell array in the memory cell array has a constitution that is capable of corresponding with a plurality of ECC code lengths. An input-side parity generation circuit that generates parities from write data, an output-side parity generation circuit that generates parities from read data, and a syndrome generation circuit that generates a syndrome bit that indicates an error bit from the read parity bits and generated parity bits are constituted so as to be capable of switching, according to the plurality of ECC code lengths.
摘要:
The data memory cell array and parity memory cell array in the memory cell array has a constitution that is capable of corresponding with a plurality of ECC code lengths. An input-side parity generation circuit that generates parities from write data, an output-side parity generation circuit that generates parities from read data, and a syndrome generation circuit that generates a syndrome bit that indicates an error bit from the read parity bits and generated parity bits are constituted so as to be capable of switching, according to the plurality of ECC code lengths.
摘要:
A timer measures a predetermined time from the reception of an external access signal, and outputs an access request signal after the predetermined time has elapsed. The external access signal causes a memory core to execute a read operation, and the access request signal causes the memory core to operate. The predetermined time is set to be longer than a core operation time for the memory core to perform a single operation. The memory core thus performs no operation when the external access signal varies in a time shorter than the predetermined time. Consequently, it is possible to prevent the memory core from malfunctioning and data retained therein from crashing even when external access signals are supplied at intervals at which the memory core is unable to properly operate.
摘要:
A timer measures a predetermined time from the reception of an external access signal, and outputs an access request signal after the predetermined time has elapsed. The external access signal causes a memory core to execute a read operation, and the access request signal causes the memory core to operate. The predetermined time is set to be longer than a core operation time for the memory core to perform a single operation. The memory core thus performs no operation when the external access signal varies in a time shorter than the predetermined time. Consequently, it is possible to prevent the memory core from malfunctioning and data retained therein from crashing even when external access signals are supplied at intervals at which the memory core is unable to properly operate.
摘要:
A semiconductor storage device includes a memory cell array in which a memory cell including an MOS capacitor is arranged; a power supply unit that supplies a plate voltage to a plate line that is coupled to a gate electrode of the MOS capacitor; and a switch that couples the plate line to a first power supply line when an access to the memory cell array is caused.
摘要:
A semiconductor storage device includes a memory cell array in which a memory cell including an MOS capacitor is arranged; a power supply unit that supplies a plate voltage to a plate line that is coupled to a gate electrode of the MOS capacitor; and a switch that couples the plate line to a first power supply line when an access to the memory cell array is caused.
摘要:
Semiconductor memory for inputting and outputting data synchronously with a clock, comprising: a clock reception unit for receiving the clock; and a command reception unit for initially receiving a first specific command synchronizing with the clock after turning a power on, after a low-power standby or after an initialization, followed by starting a command reception.
摘要:
Second memory cells of a second memory block each have an area 2a times (a is a positive integer) that of each first memory cell of a first memory block. Sizing the first and second memory cells in a predetermined ratio can make easily identical the dimensions of the first memory block and the second memory block. Consequently, it is possible to easily align peripheral circuits to lie around the plurality of first and second memory blocks, such as decoders. This also facilitates the wiring of signal lines to be connected to the peripheral circuits. This makes it possible to improve the layout design efficiency for a semiconductor integrated circuit. Thus, a plurality of types of memory blocks can be formed on a semiconductor integrated circuit efficiently. The semiconductor integrated circuit can be prevented from increasing in chip size depending on the layout design, owing to its simplified layout.
摘要:
A timer measures a predetermined time from the reception of an external access signal, and outputs an access request signal after the predetermined time has elapsed. The external access signal causes a memory core to execute a read operation, and the access request signal causes the memory core to operate. The predetermined time is set to be longer than a core operation time for the memory core to perform a single operation. The memory core thus performs no operation when the external access signal varies in a time shorter than the predetermined time. Consequently, it is possible to prevent the memory core from malfunctioning and data retained therein from crashing even when external access signals are supplied at intervals at which the memory core is unable to properly operate.