Memory Device Fast Mode Boot Latency
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Solution Overview
Problem
Existing memory devices face significant latency issues during system boot procedures, particularly in automotive systems, due to managed NAND initialization, read, and write operations, which can exceed the required time limits for systems like advanced driver-assistance systems (ADAS) and controller area network (CAN) specifications.
Innovation Solution
Implementing a fast mode for memory devices that delays certain initialization, read, and write operations until after the system boot is complete, allowing the memory device to operate in a reduced capability mode during boot and switch to a full capability mode post-boot, thereby reducing latency and improving system performance without increasing system complexity or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If managed NAND initialization and read/write operations are performed during system boot, then data accessibility is improved, but system boot time exceeds latency requirements
Solution Approach 1:
The patent segments memory operations into two distinct modes: fast mode for critical boot operations and normal mode for full functionality. This segmentation allows the system to perform only essential initialization operations during boot using fast mode, while deferring non-critical operations to normal mode, thereby meeting latency requirements without sacrificing data accessibility.
Solution Approach 2:
The memory device dynamically switches between fast mode and normal mode based on system boot status. During boot, the system operates in fast mode with limited capabilities; after boot completion, it transitions to normal mode with full capabilities. This dynamic adaptation resolves the contradiction by providing appropriate performance levels at appropriate times.
2Adaptability or versatility
If full capability mode is maintained during system boot, then operational functionality is improved, but system complexity and cost increase
Solution Approach 1:
The patent applies partial action by implementing a reduced capability fast mode that provides only the essential functions needed during boot, rather than maintaining full capability mode throughout. This partial implementation of memory operations during boot reduces system complexity and cost while ensuring adequate operational functionality for critical operations.
Solution Approach 2:
The patent applies local quality by providing different operational characteristics to different phases of system operation. Fast mode provides simplified operations optimized for speed during boot, while normal mode provides full functionality after boot. This localized optimization of memory behavior for specific operational contexts resolves the contradiction between functionality and complexity.
Data Source
AI summary
Methods, systems, and devices for fast mode for a memory device are described. In some examples, a memory device may be initialized during a system boot procedure. The memory device may support multiple modes of operation, including at least a first mode that includes a first set of capabilities, and a second made that includes the first set of capabilities, as well as one or more additional capabilities. The memory device may perform the initialization while operating the memory device according to the first mode, which may include delaying one or more actions associated with the one or more additional capabilities. After the system boot procedure is complete, the memory device may operate according to the second mode, which may include performing an action delayed during the system boot.