OTP Memory Bit Reuse for Multi-Configuration ICs
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Solution Overview
Problem
Existing integrated circuits (ICs) face challenges in efficiently adapting to different design configurations due to the high cost and space requirements of increasing the number of one-time programmable (OTP) memory bits, which are necessary for various usage scenarios and customer-specific requirements.
Innovation Solution
The reuse of existing OTP memory bits for multiple purposes is facilitated through a decoder circuit that determines design configurations based on a subset of bits, allowing the same IC to operate in different scenarios without physically increasing the number of bits, thereby optimizing die area and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of OTP memory bits is increased to support more design configurations, then the adaptability of ICs to different usage scenarios is improved, but the die area and manufacturing cost increase
Solution Approach 1:
The patent makes OTP memory bits serve multiple functions by using a decoder circuit to interpret the same bit patterns differently based on a configuration identifier. The same physical bits can represent different configuration values depending on which identifier is active, allowing one set of bits to support multiple design configurations without increasing die area.
Solution Approach 2:
The patent adds a temporal/dimensional dimension to bit interpretation by introducing configuration identifiers that switch the meaning of bit patterns over time or context. Instead of needing separate physical bits for each configuration, the system uses the same bits with different interpretations based on the active identifier, effectively adding a dimension of configurability without physical expansion.
2Adaptability or versatility
If the number of OTP memory bits is increased to accommodate more configuration options, then the versatility for different customers and scenarios is improved, but the manufacturing cost increases
Solution Approach 1:
The decoder circuit enables universal use of the same OTP memory bits across different customer requirements and scenarios. By interpreting bit patterns differently based on configuration identifiers, the system provides customized functionality for different customers without requiring custom hardware or increased memory capacity for each customer segment.
Solution Approach 2:
The patent changes the interpretive parameters of the OTP memory bits rather than changing the physical bits themselves. By varying the configuration identifier parameter, the same physical bit pattern can represent different configuration values, allowing cost-effective customization for different manufacturing scenarios and customer requirements.
3Adaptability or versatility
If more OTP memory bits are used to specify different design configurations, then the capability to meet specific customer requirements is improved, but the device complexity increases
Solution Approach 1:
The decoder circuit acts as an intermediary between the OTP memory bits and the functional circuits. It translates the same bit patterns into different configuration values based on the active identifier, thereby meeting diverse customer requirements without increasing the complexity of the OTP memory itself. The intermediary handles the complexity of multiple interpretations while keeping the memory structure simple.
Data Source
AI summary
According to an aspect of the present disclosure, an (fabricated) integrated circuit (IC) comprises a one-time programmable (OTP) memory storing multiple bits, multiple functional circuits and a decoder circuit operable to read, from the OTP memory, a set of bits and determine a first design configuration based on a subset of the set of bits. Each design configuration corresponds to a scenario of usage of the IC and specifies a respective convention on usage of a rest of the set of bits for corresponding features to be realized based on one or more of the functional circuits. The decoder circuit then operates a set of functional circuits to realize a first set of features indicated by the rest of the set of bits according to the respective convention corresponding to the first design configuration.