caption: By contrast, the second form, attached to the Harvard-style cores, has separate caches for data and instruction.
exif: {"Image DocumentName": "By contrast, the second form, attached to the Harvard-style cores, has separate caches for data and instruction.", "Image ImageDescription": "A cache provides an overall increase in performance but at the expense of predictable execution. But for real-time systems it is paramount that code execution is deterministic\u2014 the time taken for loading and storing instructions or data must be predictable. This is achieved using a form of memory called tightly coupled memory (TCM). TCM is fast SRAM located close to the core and guarantees the clock cycles required to fetch instructions or data\u2014critical for real-time algorithms requiring deterministic behavior. TCMs appear as memory in the address map and can be accessed as fast memory. An example of a processor with TCMs is shown in Figure 2. By combining both technologies, ARM processors can have both improved performance and predictable real-time response. Figure 3 shows an example core with a combination of caches and TCMs.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}