Abstract:
A semiconductor memory device includes a first count circuit suitable for counting a first clock signal which continuously toggles in each burst refresh cycle, and generating a first count code signal, based on a burst refresh command signal; a cycle guide circuit suitable for generating a second clock signal which toggles once in each burst refresh cycle, based on the burst refresh command signal and a precharge signal; a second count circuit suitable for counting the second clock signal and generating a second count code signal; and a control circuit suitable for generating a latch control signal for latching a target address in each burst refresh cycle, based on the first count code signal and the second count code signal.
Abstract:
An address counting circuit includes an address counter suitable for counting an address in response to a counting signal; and a counting control block suitable for controlling the address counter to skip the address of at least one predetermined value.
Abstract:
A test setting circuit includes a first detection unit suitable for detecting whether a first code is sequentially inputted based on a first sequence, at each of first to Nth steps, where N is a natural number; a second detection unit suitable for sequentially receiving a second code through the first to Nth steps, and detecting whether the second code that is sequentially inputted through the first to Nth steps has a value corresponding to a second sequence; and a test setting unit suitable for setting a test mode when it is detected that the first code and the second code are inputted to satisfy the first sequence and the second sequence.
Abstract:
A latch circuit may include: first to Nth storage nodes where N is an even number equal to or more than four; first to Nth pairs of transistors each including a PMOS transistor and an NMOS transistor which are coupled in series through a corresponding storage node among the first to Nth storage nodes, wherein each of the first to Nth storage nodes is coupled to a gate of the NMOS transistor of the transistor pair at the previous stage and a gate of the PMOS transistor of the transistor pair at the next stage; first to Nth PMOS transistors suitable for driving corresponding storage nodes among the first to Nth storage nodes to a high level; and first to Nth NMOS transistors suitable for driving corresponding storage nodes among the first to Nth storage nodes to a low level.
Abstract:
A semiconductor memory device includes a normal command generation unit suitable for generating a normal refresh command in response to a refresh command; a smart command generation unit suitable for performing a counting operation on the refresh command to generate a plurality of smart refresh commands which are activated at a predetermined period; and a refresh operation unit suitable for performing a refresh operation in response to the normal refresh command and the plurality of smart refresh commands, wherein the smart command generation unit resets the counting operation when entering into the refresh operation.
Abstract:
A semiconductor memory device includes a first count circuit suitable for counting a first clock signal which continuously toggles in each burst refresh cycle, and generating a first count code signal, based on a burst refresh command signal; a cycle guide circuit suitable for generating a second clock signal which toggles once in each burst refresh cycle, based on the burst refresh command signal and a precharge signal; a second count circuit suitable for counting the second clock signal and generating a second count code signal; and a control circuit suitable for generating a latch control signal for latching a target address in each burst refresh cycle, based on the first count code signal and the second count code signal.
Abstract:
An address counting circuit includes an address counter suitable for counting an address in response to a counting signal; and a counting control block suitable for controlling the address counter to skip the address of at least one predetermined value.
Abstract:
An address counting circuit includes an address counter suitable for counting an address in response to a counting signal; and a counting control block suitable for controlling the address counter to skip the address of at least one predetermined value.
Abstract:
An operating method of a memory device including a plurality of memory cells may include: measuring data retention times of at least a portion of the plurality of memory cells; and optimizing a refresh operation on the plurality of memory cells using the measurement result.