Memory Controller Data Strobe Configuration
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Solution Overview
Problem
Traditional memory controller configurations require multiple pairs of data strobe lines for every 64 data lines, leading to increased silicon real estate usage and power consumption, limiting the miniaturization and efficiency of memory systems.
Innovation Solution
Configuring memory controllers with no more than two pairs of strobe terminals for every 64 data terminals, reducing the number of data strobe lines and terminals, and using digital logic circuitry to selectively disable unused strobe pairs during low-power modes to minimize power consumption and silicon usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pairs of data strobe lines are used for every 64 data lines, then data transmission reliability is improved, but silicon real estate usage increases and power consumption increases
Solution Approach 1:
The patent merges multiple strobe line pairs into a single shared strobe line that serves multiple data lanes. Instead of having dedicated strobe lines for each data lane, a single strobe line is time-multiplexed across multiple lanes, reducing the total number of physical connections and silicon real estate required while maintaining data transmission reliability through coordinated timing control.
Solution Approach 2:
The strobe line is designed to perform multiple functions by serving different data lanes at different time intervals. A single strobe line acts as a universal timing reference for multiple data transmission channels, eliminating the need for dedicated strobe lines for each lane and thereby reducing overall system complexity and power consumption.
2Reliability
If multiple pairs of data strobe lines are used for every 64 data lines, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
Multiple strobe line pairs are merged into a single shared strobe line that is activated only when needed for specific data transmissions. This consolidation reduces the total number of active electrical connections, thereby lowering power consumption while maintaining reliable data transmission through precise timing control of the shared resource.
Solution Approach 2:
The shared strobe line operates periodically, being activated only during specific time intervals when data transmission is required on particular lanes. This periodic activation pattern reduces average power consumption compared to having continuously active dedicated strobe lines for each lane, while still ensuring reliable data transmission when needed.
3Productivity
If multiple pairs of strobe terminals are used, then data transmission capability is improved, but device size increases
Solution Approach 1:
Multiple strobe terminals are merged into a single shared terminal that serves multiple data lanes through time-multiplexing. This reduction in the number of physical terminals directly decreases device size and footprint while maintaining full data transmission capability across all lanes by coordinating the shared terminal's activation timing with each lane's data transmission schedule.
Solution Approach 2:
The patent transitions from a spatial arrangement where each data lane has its own dedicated strobe line to a temporal arrangement where a single strobe line serves multiple lanes at different times. This dimensional shift from space to time allows the system to maintain high data transmission capability while dramatically reducing the physical device size and terminal count.
Data Source
AI summary
Disclosed embodiments may include a circuit having a plurality of data terminals, no more than two pairs of differential data strobe terminals associated with the plurality of data terminals, and digital logic circuitry. The digital logic circuitry may be coupled to the data terminals and configured to use the no more than two pairs of differential data strobe terminals concurrently with the plurality of data terminals to transfer data. Other embodiments may be disclosed.