Logical-to-Physical Bank Mapping Cache for Quad-Port Memory

The memory system is segmented into multiple independent memory banks (first bank, second bank, third bank, fourth bank) that can operate simultaneously. Each bank handles specific access patterns, allowing parallel read and write operations without requiring a fully custom dual-port design. This segmentation enables concurrent accesses while maintaining area efficiency by using standard memory cell structures.

The memory device provides universal quad-port access capability through a standardized architecture that can handle various access patterns (read-read, write-write, read-write combinations) across multiple banks. The control logic universally manages address routing and data flow to support up to two simultaneous read operations and two simultaneous write operations without requiring custom design for each specific access pattern.

By segmenting the memory into multiple banks that can be independently activated, the system only powers the specific banks needed for current operations. This selective activation reduces overall power consumption compared to a custom dual-port design where all memory circuits would be actively managed regardless of usage pattern.

The control logic dynamically routes addresses and activates only the necessary memory banks based on the current access pattern. This dynamic bank selection and address routing minimizes the number of simultaneously active memory circuits, thereby reducing power consumption while maintaining the ability to support concurrent read and write operations.

The memory is divided into multiple banks that can be accessed simultaneously by different ports. This allows true parallel access where each bank handles its own operations independently, eliminating the need to run a single bank at doubled frequency. Consequently, access latency is reduced because operations occur in parallel across banks rather than sequentially within a single high-speed bank.

The patent transitions from a single-dimension approach (one bank running at 2x frequency) to a multi-dimensional approach (multiple banks running at normal frequency with parallel access). By adding the bank dimension for parallelism, the system achieves dual-port functionality without the latency penalty of doubled clock frequency operation.

The memory device segments functionality across four separate memory banks, each optimized for standard density. This segmentation allows the system to achieve 4-port equivalent functionality (two simultaneous reads and two simultaneous writes) using conventional memory cell structures rather than specialized high-speed register file cells, thereby maintaining area density comparable to standard SRAM.

The control logic provides universal quad-port access capability by dynamically routing addresses and data flows across the four banks. This standardized multi-functional approach achieves the same concurrency as custom 4-port register files but with better area density by using standard memory structures rather than specialized high-speed cells.