Latch Clock Control for Low-Power Command Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices in mobile systems face challenges in completely interrupting clock generation during power-down mode due to the need to perform various internal operations, leading to ongoing clock generation in standby mode, which increases power consumption.
Innovation Solution
The electronic device incorporates a latch clock generation circuit, command decoder, and latency shifting circuit to generate and synchronize internal operation signals based on chip selection signals and internal clocks, allowing for reduced power consumption by activating these components only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the clock generation is interrupted in power-down mode, then power consumption is reduced, but the device cannot receive commands necessary for internal operations
Solution Approach 1:
The clock signal is segmented into multiple phases: a first clock signal for receiving commands during power-down mode, and a second clock signal for internal operations after activation. This segmentation allows the device to maintain command reception capability while reducing overall clock generation time, thereby lowering power consumption without sacrificing operational functionality.
2Productivity
If the clock generation continues in standby mode to perform internal operations, then internal operations can be executed, but power consumption increases
Solution Approach 1:
The device employs periodic clock signals with different characteristics for different operational phases. A first periodic clock signal operates during power-down mode for command reception, while a second clock signal operates during standby mode for internal operations. This periodic action allows the device to perform necessary internal operations only when activated, reducing unnecessary clock generation and power consumption during extended standby periods.
3Reliability
If the latch clock is activated continuously to ensure command decoding, then command decoding reliability is maintained, but power consumption increases during standby mode
Solution Approach 1:
The latch clock signal is dynamically controlled based on operational state. During power-down mode, the latch clock operates at a first frequency to ensure reliable command decoding. When transitioning to standby mode, the latch clock frequency is adjusted or deactivated, maintaining decoding reliability when needed while reducing power consumption during extended standby periods. This dynamic adjustment resolves the contradiction between reliability and power consumption.
Data Source
AI summary
An electronic device includes a latch clock generation circuit, a command decoder, and a latency shifting circuit. The latch clock generation circuit generates a latch clock based on a chip selection signal. The command decoder generates an internal operation signal from an internal chip selection signal and an internal command generated based on the latch clock. The latency shifting circuit generates an end signal by shifting the internal operation signal in synchronization with a shifting clock by a period corresponding to a latency while an internal operation is performed.