Separate Command-Address Interface for High-Speed Memory Reliability Data
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Solution Overview
Problem
Existing methods for interfacing commands, addresses, and data in existing semiconductor memory devices are not optimized for high-speed, high-efficiency, and/or reliability data transmission, particularly in semiconductor storage devices, with existing semiconductor memory devices, have difficulty in meeting the demand for high-speed data input/output speeds, and existing interfacing methods for interfacing commands, addresses, and data input/output pins are not optimized for high-speed data input/output speeds.
Innovation Solution
The storage device uses a separate command/address (SCA) protocol for data exchange, which includes a storage controller and a nonvolatile memory device, which employs a separate command/address (SCA) interface for high-speed, high-efficiency, and/or reliability data transmission, particularly in semiconductor memory devices, with a separate command/address (SCA) interface for high-speed, high-efficiency, and/or reliability data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If commands, addresses, and data are transmitted through shared input/output pins, then device complexity is reduced, but data transmission speed and efficiency deteriorate
Solution Approach 1:
The interface is segmented into separate command/address lines and data lines. The command/address lines are dedicated to transmitting commands and addresses, while data lines are dedicated to data transmission. This segmentation eliminates signal interference and allows for optimized high-speed data transmission without sharing pins, resolving the contradiction between speed and complexity by making the complexity manageable through functional separation.
Solution Approach 2:
A command/address interface unit is introduced as an intermediary component between the host and the memory device. This intermediary handles the command and address transmission separately from data transmission, enabling high-speed data operations while managing interface complexity through a dedicated control unit that coordinates the separate command/address and data pathways.
2Productivity
If separate command/address interface is implemented, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The command and address signals are merged onto a single separate command/address line interface, which is distinct from the data lines. This merging of command and address functions into a dedicated interface allows for efficient high-speed data transmission while managing complexity by combining control functions rather than multiplying them across separate lines.
Solution Approach 2:
The command/address interface unit serves multiple functions: it transmits commands, addresses, and controls the timing and sequencing of data operations. This multi-functionality in a dedicated interface improves data transmission efficiency while managing complexity by consolidating control responsibilities into a single versatile interface unit rather than requiring separate dedicated lines for each function.
3Reliability
If existing interfacing method is used, then ease of manufacture is maintained, but reliability of high-speed data transmission deteriorates
Solution Approach 1:
By segmenting the interface into separate command/address and data lines, signal interference is eliminated and data transmission reliability at high speeds is improved. The segmentation is implemented in a manner that maintains manufacturability by using standard pin assignments and allowing flexible physical layout, thus achieving higher reliability without significantly complicating the manufacturing process.
Solution Approach 2:
The command/address interface incorporates feedback mechanisms where the interface unit monitors and coordinates the timing between command/address transmission and data operations. This feedback control ensures reliable high-speed data transmission by dynamically adjusting timing parameters while maintaining ease of manufacture through automated timing generation rather than requiring complex manual synchronization circuitry.
Data Source
AI summary
Disclosed is a storage device comprising, a storage controller configured to transmit a command and an address with a command/address line separated from a data line, and a nonvolatile memory device configured to sense read data and reliability data from a memory area corresponding to the address and transmits the read data and the reliability data to the storage controller. The storage controller is configured to transmit a setting signal associated with controlling output of the reliability data to the nonvolatile memory device using the command/address line.