Buffer Chip Signal Swapping for Memory Package Integrity
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Solution Overview
Problem
Conventional storage devices face challenges in maintaining signal integrity and power integrity as clock speeds increase, particularly due to communication protocol limitations between host devices and storage devices, leading to performance bottlenecks.
Innovation Solution
A memory package with a buffer chip that enables signal swapping based on a swap enable signal, allowing for improved signal integrity and power integrity without altering the legacy structure of nonvolatile memory chips, using package mirroring to align signal paths and reduce signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If clock speeds are increased to improve communication speed between host device and storage device, then communication speed is improved, but signal integrity and power integrity become impaired
Solution Approach 1:
A buffer chip is introduced as an intermediary component between the memory package and the external device. The buffer chip includes a swap controller that receives a swap control signal and generates a swap signal to control signal swapping between memory chips and the external device. This intermediary structure enables protocol adaptation and signal integrity maintenance at higher clock speeds without requiring changes to the legacy memory chip structure.
Solution Approach 2:
The system dynamically swaps signal paths based on the state of the swap enable signal. When the swap enable signal is enabled, the buffer chip swaps the signal paths between the memory chips and the external device. This dynamic switching capability allows the system to adapt to different communication protocols and maintain signal integrity at varying clock speeds by selecting appropriate signal routing paths.
2Speed
If clock speeds are increased to improve communication speed, then communication speed is improved, but power integrity becomes impaired
Solution Approach 1:
The buffer chip serves as a power management intermediary that can dynamically control power delivery to memory chips based on communication protocol requirements. The swap controller within the buffer chip coordinates power signals with data signals, ensuring stable power integrity during high-speed communication by preventing power fluctuations that would otherwise occur at increased clock speeds.
3Reliability
If package mirroring is implemented to improve signal integrity, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The patent extracts the signal swapping and protocol adaptation functionality from the memory chips themselves and places it in a separate buffer chip. This extraction allows the legacy memory chips to remain unchanged while the buffer chip handles the complexity of signal path management. The buffer chip includes dedicated swap controllers that manage the mirroring and swapping operations, isolating the complexity from the core memory storage function.
Solution Approach 2:
The system is segmented into distinct functional components: legacy memory chips for storage, a buffer chip for signal management, and a swap controller for protocol adaptation. This segmentation allows each component to be optimized independently - the memory chips can remain as simple storage devices while the buffer chip handles the complex signal integrity requirements through dedicated swap controllers and signal path management circuits.
Data Source
AI summary
A memory package includes; a first memory chip including first memory pads, and a buffer chip including first buffer pads respectively connected with the first memory pads and second buffer pads connected with an external device. The buffer chip respectively communicates signals received via the second buffer pads to the first buffer pads in response to a swap enable signal having a disabled state, and the buffer chip swaps signals received via the second buffer pads to generate first swapped signals, and respectively communicates the first swapped signals to the first buffer pads in response to the swap enable signal having an enabled state.