Semiconductor Data Alignment Circuit for High-Speed Stability
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Solution Overview
Problem
Current semiconductor devices, such as SDR and DDR synchronous memory devices, face limitations in operation speed and integration density, necessitating the development of more advanced systems that can efficiently align and process data in synchronization with clock signals to meet the demands of high-performance electronic systems.
Innovation Solution
A semiconductor system comprising a first and second semiconductor device, where the second device includes a latch data generating circuit and a clock synchronization circuit to align and latch data in synchronization with internal strobe signals, generating alignment data and latch data, and a clock synchronization circuit to output write data in response to an input clock, enhancing data processing and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data alignment and latching is performed in synchronization with data strobe signals, then data transmission stability is improved, but device complexity increases
Solution Approach 1:
The semiconductor device is divided into two separate devices: a first semiconductor device that outputs data, data strobe signal, external command, and clock signal; and a second semiconductor device that performs data alignment and latching. This segmentation allows each device to specialize in specific functions, improving data transmission stability while distributing circuit complexity across multiple components.
Solution Approach 2:
A latch signal generated by dividing the data strobe signal serves as an intermediary mechanism between the data output stage and the data processing stage. This intermediary signal coordinates the timing between data output and data alignment/latching operations, ensuring stable data transmission through precise synchronization.
2Speed
If multi-bit pre-fetch scheme is used to process multi-bit data in parallel, then operation speed is improved, but device complexity increases
Solution Approach 1:
The multi-bit pre-fetch functionality is segmented between two semiconductor devices. The first device handles data output with multi-bit parallel capability, while the second device handles alignment and latching. This segmentation enables high-speed parallel data processing without concentrating all complexity in a single device.
Solution Approach 2:
Data alignment is performed preliminarily in the second semiconductor device before data is latched and output. By aligning multi-bit data in parallel with the data strobe signal beforehand, the system prepares data for subsequent processing, enabling faster operation speeds through pre-computed parallel alignment.
3Productivity
If clock signal frequency is increased to achieve higher operation speed, then productivity is improved, but data transmission stability deteriorates
Solution Approach 1:
The system uses periodic data strobe signals to synchronize data alignment and latching operations. By dividing the data strobe signal to generate latch signals at specific phases, the system maintains stable periodic timing relationships even at high operation speeds, ensuring data transmission stability while achieving high productivity through multi-bit parallel processing.
Data Source
AI summary
A semiconductor system includes a first semiconductor device and a second semiconductor device. The first semiconductor device outputs data, a data strobe signal, an external command, and a clock signal. The second semiconductor device aligns the data in synchronization with the data strobe signal to generate first and second alignment data and latches the first and second alignment data to generate first and second latch data in response to a latch signal which is generated by dividing the data strobe signal.