Scratchpad RAM
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High Quality Content by WIKIPEDIA articles! Scratchpad memory (SPM), also known as scratchpad, scatchpad RAM or local store in computer terminology, is a high-speed internal memory used for temporary storage of calculations, data, and other work in progress. In reference to a microprocessor ("CPU"), scratchpad refers to a special high-speed memory circuit used to hold small items of data for rapid retrieval. It can be considered as similar to an L1 cache in that it is the memory next closest to the ALU's after the internal registers, with explicit instructions to move data from and to main mem...
High Quality Content by WIKIPEDIA articles! Scratchpad memory (SPM), also known as scratchpad, scatchpad RAM or local store in computer terminology, is a high-speed internal memory used for temporary storage of calculations, data, and other work in progress. In reference to a microprocessor ("CPU"), scratchpad refers to a special high-speed memory circuit used to hold small items of data for rapid retrieval. It can be considered as similar to an L1 cache in that it is the memory next closest to the ALU's after the internal registers, with explicit instructions to move data from and to main memory, often using DMA-based data transfer. In contrast with a system that uses caches, a system with scratchpads is a system with Non-Uniform Memory Access latencies, because the memory access latencies to the different scratchpads and the main memory vary. Another contrast with a system that employs caches is that a scratchpad commonly does not contain a copy of data that is also stored in the main memory.
