Microcontroller IO Sequencer for Limited Instruction Memory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Memory sub-systems with limited internal IO instruction memory face challenges in efficiently processing a large number of IO vectors due to complex encoding schemes and hardware limitations, leading to inefficiencies and reliability issues in handling a wide range of memory access commands, particularly in 3D cross-point memory devices.
Innovation Solution
Implementing a microcontroller-based IO sequencer that interprets limited-width IO instructions with a defined structure to generate longer IO vectors, allowing direct control of multiple IO signals, support future communication protocols, and reduce the number of required instructions, thus optimizing the use of internal IO instruction memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex encoding schemes are used to handle a wide range of memory access commands, then the number of IO vectors that can be processed increases, but the device complexity and reliability deteriorate due to hardware limitations and processing inefficiencies
Solution Approach 1:
The patent segments the IO instruction into multiple fields (opcode field, operand field, control field) that can be independently decoded and processed. This segmentation allows the system to handle a wide variety of memory access commands using simple, modular field-based processing rather than complex overall encoding schemes.
Solution Approach 2:
Instead of using complex encoding schemes to expand the number of handleable commands, the patent inverts the approach by using simple fixed-width instructions with structured fields that can be systematically combined. The versatility comes from the structured field organization rather than from complex encoding, turning the problem inside out.
2Area of stationary object
If fixed-size internal IO instruction memory is used, then area and cost are reduced, but the number of IO vectors that can be stored and processed is limited
Solution Approach 1:
The fixed-size internal IO instruction memory is designed with a universal structured format that can efficiently represent multiple types of memory access commands. Each instruction uses standardized fields (opcode, operand, control) that can encode various operations, allowing the limited memory space to handle a diverse range of commands without requiring additional storage capacity.
Solution Approach 2:
The patent changes the parameter organization within each instruction from variable-length complex encoding to fixed-width structured fields. This parameter reorganization allows more efficient packing of instructions in the limited memory space while maintaining the ability to represent a wide range of operations through systematic field combinations.
3Quantity of substance
If simple fixed-width IO instructions are used, then the internal IO instruction memory requirements are reduced, but the ability to control multiple IO signals directly is diminished
Solution Approach 1:
The IO control functionality is segmented into distinct fields within the fixed-width instruction: the opcode field identifies the operation type, the operand field specifies the target, and the control field directly controls IO signal behavior. This segmentation enables direct IO signal control through dedicated control fields while maintaining fixed-width instruction format.
4Adaptability or versatility
If complex encoding schemes are implemented, then more IO vectors can be processed, but processing speed and reliability worsen due to hardware limitations
Solution Approach 1:
The instruction processing is segmented into independent field decodings (opcode decoding, operand decoding, control decoding) that can be processed in parallel or sequentially without complex interdependencies. This segmentation simplifies the processing pipeline and increases speed compared to complex holistic encoding schemes that require multi-stage decoding.
Solution Approach 2:
Instead of increasing processing complexity to handle more IO vectors, the patent inverts the approach by using simple fixed-width instructions with structured fields that can be rapidly decoded. The versatility to handle various IO vectors is achieved through systematic field combinations rather than complex processing logic, thereby maintaining high processing speed.
Data Source
AI summary
A processing device in a memory sub-system retrieves an input/output (IO) instruction of a plurality of IO instructions from an IO instruction memory in the memory sub-system, the IO instruction comprising a first number of bits. The processing device further generates an IO vector based on the IO instruction, the IO vector comprising a second number of bits, wherein the second number of bits is greater than the first number of bits. In addition, the processing device causes a plurality of IO signals, based on the IO vector, to be driven on a signal communication bus to a memory device in the memory sub-system, wherein the plurality of IO signals comprises a number of signals equal to the second number of bits of the IO vector.