Stacked Memory Interface Chip Dynamic Channel Configuration
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Solution Overview
Problem
Current semiconductor memory devices face challenges in efficiently selecting and configuring multiple stacked memory chips due to limitations in terminal connections and signal management, leading to suboptimal performance and flexibility in chip configurations.
Innovation Solution
A semiconductor memory device architecture that includes a plurality of stacked memory chips connected through through-silicon vias (TSVs) and an interface chip, allowing for flexible chip configuration through a combination of chip enable signals, ready/busy signals, and channel allocation, enabling dynamic selection and communication with external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple memory chips are stacked and connected through TSVs to an interface chip, then memory capacity and integration are improved, but terminal connection limitations and signal management complexity increase
Solution Approach 1:
The interface chip divides the memory system into multiple independent channels, each capable of handling signals to/from individual memory chips. This segmentation allows parallel signal management across multiple chips without overwhelming the interface, resolving the contradiction between increased memory capacity and signal management complexity.
Solution Approach 2:
The interface chip acts as an intermediary between the external device and multiple stacked memory chips. It manages the complexity of multiple TSV connections and chip enable signals internally, presenting a simplified interface to external devices while handling the complex signal routing and chip selection logic.
2Volume of moving object
If multiple memory chips are stacked with TSV connections, then integration density is improved, but flexibility in chip configuration deteriorates
Solution Approach 1:
The interface chip implements dynamic chip enable signals that can be programmatically controlled to activate or deactivate specific memory chips based on configuration requirements. This dynamic control mechanism allows the stacked memory system to be reconfigured for different capacities and performance levels, maintaining flexibility despite high integration density.
Solution Approach 2:
The system allows changing operational parameters such as chip enable signal assignments, channel configurations, and memory mapping to adapt the stacked memory architecture to different application requirements. This parameter adjustability enables the same physical stack to serve multiple configuration needs.
3Productivity
If chip enable signals and ready/busy signals are used for memory chip selection, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The interface chip merges multiple control functions into unified chip enable signals and ready/busy signals that manage multiple memory chips simultaneously. By combining chip selection, activation, and status monitoring into integrated signal protocols, the system achieves efficient multi-chip communication without proportionally increasing terminal connection complexity.
Data Source
AI summary
A semiconductor memory device includes a plurality of memory chips that are stacked above one another and connected to each other through a through via, an interface chip that is connected to the plurality of memory chips, and a plurality of first terminals for connection with an external device. The interface chip includes a plurality of second terminals that are connected to the plurality of first terminals, and is capable of receiving a signal that is supplied from the external device through the first and second terminals, and stores configuration information according to which a set number of the second terminals are designated for receiving control signals for the plurality of memory chips.