Mixed Memory Module Controller for Latency Mismatch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing data throughput requirements in computing systems often exceed the data bandwidth or communication speed of SSD interfaces, leading to a data bottleneck that decreases system performance.
Innovation Solution
A method of operating a memory module that involves receiving active commands and row addresses to activate data units, transmitting status information, and performing data transactions based on column addresses, allowing for variable latency adjustments between different memory devices with distinct operating characteristics, thereby optimizing access across volatile and non-volatile memory devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SSD interface communication speed is increased to meet data throughput requirements, then data bandwidth is improved, but interface complexity and cost increase
Solution Approach 1:
The memory module is designed to support multiple memory device types (DRAM, NAND flash, NOR flash, MRAM, PRAM, ReRAM, FRAM) within a single module, allowing it to function as both volatile and non-volatile memory. This multi-functionality enables the system to achieve high data throughput by utilizing fast DRAM for frequently accessed data while maintaining the benefits of non-volatile memory for persistent storage, thereby improving productivity without requiring separate high-speed interfaces for different memory types.
Solution Approach 2:
The memory controller within the memory module acts as an intermediary between the processor and various memory device types. It manages data transactions, handles protocol conversions, and optimizes access patterns to different memory devices. This intermediary role simplifies the interface requirements at the processor level while enabling high data throughput through intelligent data management and buffering capabilities within the memory module.
2Adaptability or versatility
If different memory device types with different latencies are used in the same module, then memory versatility is improved, but access timing coordination becomes more difficult
Solution Approach 1:
The memory controller dynamically adjusts timing parameters and access sequences based on the specific memory device type being accessed. It can switch between different operational modes optimized for DRAM's low latency or NAND flash's sequential access patterns. This dynamic adaptation allows the system to accommodate multiple memory device types with different latencies while maintaining efficient access timing through real-time parameter adjustment rather than fixed timing constraints.
Solution Approach 2:
The system changes operational parameters such as access timing, data width, and command sequences based on the detected memory device type. When accessing non-volatile memory devices with higher latency, the controller extends timing intervals and uses optimized read/write sequences. For volatile memory with lower latency, it employs shorter timing windows and faster access protocols. These parameter changes enable versatile memory device support while managing timing coordination complexity through adaptive configuration.
Data Source
AI summary
A method of operating a memory module can include receiving, at the memory module, an active command and an associated row address that indicates that the active command is directed to a volatile memory device included in the memory module or to a non-volatile memory device included in the memory module. The volatile memory device or the non-volatile memory device can be activated based on the associated row address in response to the active command. Status information can be provided at the memory module indicating readiness of the memory module for receipt of an operation command associated with the active command and the associated row address.