Chained Memory Device State Change for Power Optimization
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Solution Overview
Problem
In semiconductor memory systems, managing power consumption is challenging due to varying communication rates among devices coupled in a chained configuration, where devices with higher communication rates consume more power, leading to inefficiencies in energy usage.
Innovation Solution
Implementing a method where devices in the chained configuration can change their communication states in response to commands from the host, allowing for adjustments in power usage by altering communication rates, with control circuitries managing these state changes to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If devices in chained configuration operate at high communication rates, then communication speed is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic communication rate adjustment where devices in the chained configuration can switch between different communication states (e.g., high-speed mode and low-speed mode) based on operational requirements. The host device sends commands to change the communication state of downstream devices, allowing the system to adapt communication rates dynamically rather than operating at fixed high speeds, thereby reducing power consumption when high-speed communication is not needed.
Solution Approach 2:
The patent changes the communication rate parameter of devices in the chained configuration by issuing state change commands from the host. Devices can transition between different communication states with different rate parameters, allowing the system to optimize the balance between communication speed and power consumption by adjusting this key parameter based on actual operational needs.
2Use of energy by moving object
If devices in chained configuration operate at low communication rates, then power consumption is reduced, but communication speed decreases
Solution Approach 1:
The system dynamically adjusts communication rates based on real-time operational requirements. When high-speed data transfer is needed, the host sends commands to switch devices to high-speed communication state. When data transfer requirements are low, devices operate in low-speed mode to conserve power, thus dynamically balancing speed and energy consumption rather than being locked into a fixed state.
Solution Approach 2:
The communication rate parameter is made variable through host-initiated state change commands. Devices can transition between multiple communication rate parameters depending on the data transfer needs, allowing the system to select appropriate speed-power tradeoff points by changing this critical operational parameter.
3Productivity
If all devices in chained configuration use high communication rates, then overall system throughput is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent applies different communication rates to different devices within the chained configuration based on their specific roles and data transfer requirements. Rather than uniformly setting all devices to high-speed mode, the host can selectively adjust communication states of individual devices or groups of devices, allowing high throughput where needed while maintaining energy efficiency in other parts of the system.
Solution Approach 2:
The system dynamically adjusts communication rates on a per-device or per-segment basis within the chained configuration. The host monitors system throughput requirements and selectively changes communication states of downstream devices, enabling the system to achieve high overall throughput only when and where necessary, thereby improving energy efficiency by avoiding unnecessary high-speed operation in all devices.
Data Source
AI summary
The present disclosure includes methods, devices, and systems for state change in systems having devices coupled in a chained configuration. A number of embodiments include a host and a number of devices coupled to the host in a chained configuration. The chained configuration includes at least one device that is not directly coupled to the host. The at least one device that is not directly coupled to the host is configured to change from a first communication state to a second communication state responsive to receipt of a command from the host.