摘要:
A semiconductor memory system, a memory control circuit and a semiconductor memory device are disclosed. The system includes a memory control circuit for generating a data strobe signal and a data load signal in synchronization with each other. The memory circuit, which can be an SDRAM memory circuit, receives the data strobe signal and the data load signal and writes data in response to the two synchronous signals. Because the signal are synchronous, parameters introduced by timing variations caused by different signal domains are eliminated. As a result, high-frequency operation of the system is greatly improved.
摘要:
A semiconductor memory device includes a serial to parallel converter configured to generate parallel data at a parallel data rate in response to first serial data at first serial data rate in a first mode and configured to generate the parallel data at the parallel data rate in response to a second serial data at second serial data rate in a second mode, wherein the second serial data rate is less than the first serial data rate, and a data write circuit configured to provide the parallel data to a memory cell array.
摘要:
A latency signal generating method and a corresponding semiconductor memory device, among other things, are disclosed. Such a method includes: receiving a clock signal for the semiconductor memory device; receiving a mode characterization signal; providing the DQS; and adapting the duration of a preamble state of the DQS according to the mode characterization signal to promote conformance of a strobe state of the DQS with the clock signal.
摘要:
An output data strobe signal generating method and a memory system that includes a plurality of semiconductor memory devices, and a memory controller for controlling the semiconductor memory devices, wherein the memory controller provides a command signal and a chip selecting signal to the semiconductor memory devices. One or more of the semiconductor memory devices may detect a read command and a dummy read command in response to the command signal and the chip selecting signal and generate one or more preamble signals based on a calculated preamble cycle number.
摘要:
A system and method allows for multiple modes of termination, including termination by a fixed value that is preprogrammed, and by a variable value that can, for example, be measured and determined by a self-calibration circuit. Multiple termination values can be achieved within a single device. This configuration is especially applicable to devices that have different loadings for address and data signals, for example in a configuration having a common, shared address bus, and multiple, localized data buses.
摘要:
A voltage generation circuit generates an output voltage at an output node thereof by sharing charge between a first node and a second node so as to increase a potential at the second node from a first voltage to a second voltage. The first node is charged to a third voltage and the second node is driven to a fourth voltage that is greater than the third voltage. Charge is shared between the first node and the second node so that the first and second nodes reach a common fifth voltage, which is between the third and fourth voltages. The first node is driven to a sixth voltage, which is greater than the fourth voltage. Charge is shared between the first node and the output node to generate the output voltage thereat.
摘要:
An integrated circuit comprises a substrate having circuitry integrated with the substrate. Switching circuitry is selectably operable to configure signal paths to alternative mirrored pads over the substrate. At least one of the first and second signal paths may comprise a buffer in series between the switching circuit and its respective pad.
摘要:
An output circuit for a semiconductor device that outputs an output voltage based on a received external signal. The output circuit has an interface that receives the external signal, and a comparing unit that compares the external signal with a plurality of predetermined threshold voltages. The comparing unit outputs a voltage driving signal based on the comparison results. Also, the output circuit has an output unit that outputs the output voltage based on the voltage driving signal from the comparing unit.