Semiconductor Memory Data Input Device Bandwidth Control
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Solution Overview
Problem
Semiconductor memory devices experience unnecessary current consumption due to the activation of latches even when ineffective data are applied, particularly when the bandwidth is set to X4, leading to inefficient data alignment and increased power usage.
Innovation Solution
A data input device for semiconductor memory devices is designed with a bandwidth signal input part and synchronization control parts that generate restrict-synchronization signals only when the internal bandwidth signal is activated, allowing data input parts to align data effectively while minimizing current consumption by deactivating unnecessary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data input parts are activated to align all applied data, then data alignment capability is improved, but current consumption increases due to unnecessary activation when bandwidth is set to X4
Solution Approach 1:
The data input device dynamically adjusts the activation state of data input parts based on the bandwidth setting. When bandwidth is set to X4, only the first data input part is activated while the second data input part is deactivated. This dynamic configuration allows the system to optimize between data alignment capability and current consumption by adapting to different operational requirements.
2Reliability
If latches are activated to store data in synchronization with edges, then data storage and alignment is improved, but unnecessary current consumption occurs when ineffective data are applied
Solution Approach 1:
The invention applies local quality by making different parts of the data input device have different activation states based on their relevance to the current bandwidth setting. The first data input part and its associated latches are activated to ensure reliable data storage, while the second data input part and its latches are deactivated to avoid unnecessary energy consumption, creating localized functional differences within the system.
Data Source
AI summary
A data input device of a semiconductor memory device can reduce unnecessary current consumption occurring according to a setting of a bandwidth. The data input device includes: a bandwidth signal input part for receiving a bandwidth signal for setting a data bandwidth to output an internal bandwidth signal; a synchronization control part for generating synchronization signals and restrict-synchronization signals in synchronization with a data strobe signal, an activation of the restrict-synchronization signals being restricted through the internal bandwidth signal; a first data input part for aligning the data in response to the synchronization signals; and a second data input part for aligning the data in response to the restrict-synchronization signal and the internal bandwidth signal.