Memory Device Ultra-Deep Power-Down Exit Control
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Solution Overview
Problem
Memory devices in portable applications face challenges in minimizing power consumption to prolong battery life, as existing power-down modes either increase complexity or require external power management, which can be costly and unreliable.
Innovation Solution
A memory device capable of entering an ultra-deep power-down mode with a wake-up circuit that remains powered, allowing entry and exit through specific commands or hardware resets, reducing power consumption to as low as 50 nano-amps and eliminating the need for external power management devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If existing power-down modes are used to reduce power consumption, then power consumption is reduced, but device complexity increases or external power management is required
Solution Approach 1:
The memory device provides self-service by including an internal wake-up circuit that remains powered during ultra-deep power-down mode, allowing the device to autonomously exit the low-power state without requiring external power management circuitry or complex control logic
Solution Approach 2:
The patent extracts the essential wake-up functionality from external power management devices and integrates it directly into the memory device through a dedicated wake-up circuit, eliminating the need for external components while maintaining ultra-low power consumption
2Use of energy by moving object
If existing power-down modes are used to reduce power consumption, then power consumption is reduced, but reliability decreases due to external power management requirements
Solution Approach 1:
The patent merges the power-down control and wake-up functionality into a single integrated circuit within the memory device, combining previously separate functions (power management and memory operation) into one unified system that improves reliability by eliminating external dependency
Solution Approach 2:
The wake-up circuit serves the memory device itself by monitoring for wake-up conditions and automatically exiting ultra-deep power-down mode when needed, providing self-service that eliminates reliability concerns associated with external power management failures
Data Source
AI summary
A memory device operable in an ultra-deep power-down mode can include: a command user interface; a voltage regulator having an output that provides a supply voltage for a plurality of components of the memory device, where the plurality of components comprises the command user interface; a wake-up circuit that remains powered on even when the memory device is in the ultra-deep power-down mode; the memory device being operable to enter the ultra-deep power-down mode in response to receiving a first predetermined command that causes the output of the voltage regulator to be disabled to completely power down the plurality of components during the ultra-deep power-down mode; and the memory device being operable to exit the ultra-deep power-down mode in response to receiving one of a hardware reset command sequence, a reset pin assertion, a power supply cycling, and a second predetermined command.