At present, the global medical electronics industry is gradually showing attractive development prospects, and the speed of product upgrading is increasing. At the same time, due to the particularity of medical electronic products, the performance, power consumption, reliability and integration of components are etc. The parties have put forward extremely high requirements. The world's leading semiconductor manufacturers have launched a series of products suitable for this application. The 32-bit embedded microprocessor (MPU) based on the ARM core has become the first choice for many medical electronic product development platforms due to its high performance, low power consumption and rich on-chip resources. Among them, Cirrus Logic's flagship product EP9315 is the most integrated ARM processor. The processor adopts ARM920T core, has high performance of 200MHz frequency, embedded math coprocessor, graphics acceleration engine, integrates rich peripheral circuits including IDE and PCMCIA interfaces, meets industrial standards and is very attractive. Its price/performance ratio makes it stand out among many embedded microprocessors, making it an ideal choice for the next generation of medical electronics development platforms. Application requirements There are many types of medical electronic products with different functions. According to its application classification, including ultrasound imaging system, multi-parameter monitoring system, routine inspection system and so on. Today's medical electronics always use the latest technology to achieve powerful performance to complete increasingly complex algorithms and numerous functions to meet the needs of escalating clinical applications. Its application requirements are mainly reflected in the following aspects: 1. As product performance increases, hardware is required to perform a large number of algorithms and logic operations. Products such as B-mode and high-end monitors have begun to use FPGA devices in large quantities; 2. Wide application of large size display and touch screen. At present, ultrasonic products, multi-parameter monitors and some inspection products such as blood cells, biochemical analyzers, etc. mostly use large-size displays in the range of 10'~15', using 640&TImes; 480, 800 & TImes; 600 or 1024 & TImes; . In addition, the use of touch screens in this field is also becoming more widespread; 3. Storage of large data volumes. Products such as B-mode ultrasound and color ultrasound have begun to connect external standard IDE hard disks due to the increasing application layer software and the need for deep image storage; 4. The need for a peripheral interface. Such as network interfaces and USB interfaces are indispensable in medical electronics; 5. Audio Codec application. For example, in a color Doppler system, it is necessary to perform encoding and decoding of Doppler blood stream audio data through an audio codec; 6. The emergence of portable products has increased the focus on power consumption. The above series of application requirements put forward higher requirements for the microprocessor platform. Engineers often want faster speed, higher integration and lower power consumption when selecting models, especially in terms of high integration. Design work is convenient and reliable, and it can effectively control costs. The unique advantages of EP9315 As the core control device of the system, the microprocessor's various indicators are often the most concerned by engineers when selecting models. Compared to other embedded microprocessors based on the ARM9 core, Cirrus Logic's EP9315 has significant advantages in terms of overall performance, on-chip peripheral interfaces, and system cost. The indicators of EP9315 are as follows: 1. Integrated ARM920T core with 200MHz frequency and memory management unit (MMU) supporting Linux, Windows CE and many other embedded operating systems. Have 16KB instruction cache and 16KB data cache; 2. Embedded MaverickCrunch math coprocessor, significantly improve the speed of single / double precision integer and floating point, and help the operation of complex algorithms. This is very rare in other ARM microprocessors; 3. Integrate 2D graphics acceleration engine to enhance the image processing capability of the system through block copying, block filling and other operations. The image acceleration engine is independent of the microprocessor and does not increase system overhead. Supports up to 1024 & TImes; 768 resolution, which is basically suitable for large-size screen applications of most medical electronic products; 4. Rich on-chip/peripheral interface resources can fully meet the application needs of various medical electronic products.
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