Data Buffer Counter Reset for Twisted Read Order Detection
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Solution Overview
Problem
Semiconductor memory devices experience performance issues due to twisted data buffers, where the order of data input and output is disrupted, rendering the devices unusable or impairing their functionality.
Innovation Solution
Implementing comparator and reset circuitry to detect and correct twisted data buffers by comparing count values from data and command paths, and resetting counter circuits when a mismatch is detected, ensuring synchronized input and output of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If read operations are performed continuously without monitoring, then data throughput is maintained, but twisted data buffer conditions develop that render the device unusable
Solution Approach 1:
The patent implements a monitoring mechanism that continuously compares count values from the data path and command path during read operations. When a mismatch is detected indicating a twisted data buffer condition, the system generates a reset signal to correct the issue. This feedback loop allows the system to maintain high throughput while preventing reliability degradation by detecting and correcting buffer twisting in real-time.
Solution Approach 2:
The patent performs preliminary monitoring and comparison of count values before twisted data buffer conditions fully develop and cause device failure. By detecting mismatches early in the read operation sequence, the system can reset the counter circuits proactively to prevent the device from becoming unusable, thereby maintaining both productivity and reliability.
2Reliability
If counter circuits are added to monitor data buffer status, then twisted data buffer detection is enabled, but device complexity increases
Solution Approach 1:
The patent designs the counter circuits to serve multiple functions: they track read operation counts for timing control purposes while simultaneously serving as monitoring elements to detect twisted data buffer conditions. The same count values generated for normal operation are reused for comparison and error detection, eliminating the need for separate dedicated monitoring circuits and thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the timing control function and data buffer monitoring function into a single integrated system. The counter circuits that generate timing signals for read operations also provide the comparison values needed to detect buffer twisting. This consolidation reduces the number of separate components and simplifies the overall circuit architecture while maintaining reliable detection capability.
Data Source
AI summary
A memory device includes data and command paths for various operations, such as read operations. A first counter circuit in the data path is configured to provide first count signals to a data buffer to input read data into the data buffer and a second counter circuit in the command path is configured to provide second count signals to the data buffer to output read data from the data buffer. Comparator and reset circuitry is configured to receive the first and the second count signals, compare a first count value that is based on the first count signal to a second count value that is based on the second count signal, and provide a reset signal to the first and second counter circuits when there is a mismatch between the first and second count values to reset the first and the second counter circuits.