摘要:
Semiconductor device and semiconductor memory device include a plurality of internal circuits configured to perform test operations in response to their respective test mode signals and a plurality of test-mode control units configured to control the test operations of the internal circuits to be disabled in response to a test-off signal.
摘要:
A semiconductor memory device includes a delay locked loop for achieving a delay locked state by correcting a phase difference between a reference clock and an internal delayed clock and for indicating the state that a larger delay amount than a maximum delay amount of a delay line is required, or a smaller delay amount than a minimum delay amount of delay line is required. A control unit resets the delay locked loop according to the state of the delay line.
摘要:
A semiconductor memory device is capable of controlling a delay locked loop appropriately based on operation modes, particularly in a fast power-down mode to reduce an amount of current maximumly. The semiconductor memory device includes a delay-locked clock signal generating unit, a mode signal generating unit, and a delay locking control unit. The delay-locked clock signal generating unit performs a delay locking operation on a clock signal, thereby generating a delay-locked clock signal. The mode signal generating unit enables a fast precharge power-down mode signal in a fast precharge power-down mode. The delay locking control unit controls the delay-locked clock signal generating unit to be activated in a predetermined cycle in response to the fast precharge power-down mode signal.
摘要:
An internal voltage generator according to the present invention stably supplies an internal voltage regardless a level of power voltage input from a source external to a semiconductor memory device. The present invention includes a dead zone controller to generate a reference voltage, a high reference voltage and a low reference voltage based on an inputted power voltage; and an internal power generator to generate an internal power based on the reference voltage by comparing the internal power with the high reference voltage and the low reference voltage.
摘要:
A duty cycle corrector includes a delay unit configured to adjust an input clock and an inverted input clock with a delay value controlled in response to one or more control signals and to generate a positive clock and a negative clock, and a duty detector configured to receive the positive clock and the negative clock, to detect duty ratios of the positive clock and the negative clock and to generate the one or more control signals.
摘要:
A data input device of a semiconductor memory apparatus includes input means configured to input data; precharge means configured to supply a precharge voltage for converting inputted data to a differential signal; enable means configured to enable the input means and the precharge means to operate; and control means configured to control a current amount of the enable means in a standby mode.
摘要:
A register controlled DLL circuit occupies a relatively small area in a semiconductor device by reducing the number of flip-flops for generating timing pulses that are used to control a DLL operation and sequentially toggled. The registered controlled DLL circuit for generating a DLL clock by delaying internal clocks includes a timing pre-pulse generating unit configured to generate a plurality of timing pre-pulses activated sequentially in response to a source clock, the plurality of pre-pulses being repeated two or more times in each delay shifting update period, a mask signal generating unit configured to generating a mask signal having a logic level varied according to toggling of a predetermined one of the timing pre-pulses, and a timing pulse outputting unit configured to output the plurality of timing pre-pulses as a plurality of timing pulses in response to the mask signal.
摘要:
The present invention relates to an apparatus and a method for detecting a failure of data in the semiconductor memory device. The semiconductor memory device according to the present invention includes: a global I/O line for transferring data between an external circuit and a local I/O line; an I/O sense amplifier for controlling a data transmission between the local I/O line and the global I/O line; and an I/O sense amplifier control unit for controlling the I/O sense amplifier in response to a test mode signal in order to test the semiconductor memory device, independent of the data outputted from a memory cell.
摘要:
A semiconductor memory device including a delay locked loop can minimize current consumption during a precharge power down mode. The delay locked loop includes a buffer control block for generating a clock buffer enable signal in response to first and second signals, wherein the first signal represents a precharge power down mode and the second signal represents a reset of the delay locked loop, a clock buffering block, controlled by the clock buffer enable signal, for buffering an external clock to generate a reference clock, and a feedback loop for delaying the reference clock until a delay locking state to thereby output a DLL output clock.
摘要:
A semiconductor memory device includes: a delay locked loop (DLL) clock buffer for buffering a system clock in response to the a buffer enable signal; a DLL circuit for generating a delay locked loop (DLL) clock by performing a delay locking operation using the buffered system clock; and a DLL clock buffer controller for generating the buffer enable signal in response to a code signal and a clock enable signal, the code signal containing information about whether to perform the delay locking operation.