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SP的性能受其對(duì)存儲(chǔ)器子系統(tǒng)的管理能力的影響。如前所述，MAC和其它一些信號(hào)處理功能是DSP器件信號(hào)處理的基本能力，快速M(fèi)AC執(zhí)行能力要求在每個(gè)指令周期從存儲(chǔ)器讀取一個(gè)指令字和兩個(gè)數(shù)據(jù)字。有多種方法實(shí)現(xiàn)這種讀取。比如，使用多接口存儲(chǔ)器（允許在每個(gè)指令周期內(nèi)對(duì)存儲(chǔ)器多次訪問(wèn)）、分離指令和數(shù)據(jù)存儲(chǔ)器（“哈佛”結(jié)構(gòu)及其派生類）以及指令緩存（允許從緩存讀取指令而不是存儲(chǔ)器，從而將存儲(chǔ)器空閑出來(lái)用作數(shù)據(jù)讀取）另外要注意所支持的存儲(chǔ)器空間的大小。許多定點(diǎn)DSP的主要目標(biāo)市場(chǎng)是嵌入式應(yīng)用系統(tǒng)，在這種應(yīng)用中存儲(chǔ)器一般較小，所以這種DSP器件具有小到中等片上存儲(chǔ)器（4K到64K字左右），備有窄的外部數(shù)據(jù)總線。另外，絕大多數(shù)定點(diǎn)DSP的地址總線小于或等于16位，因而可外接的存儲(chǔ)器空間受到限制一些浮點(diǎn)DSP的片上存儲(chǔ)器很小，甚至沒(méi)有，但外部數(shù)據(jù)總線寬。例如TI公司的TMS320C30只有6K片上存儲(chǔ)器，外部總線為24位，13位外部地址總線。而ADI的ADSP2-21060具有4Mb的片上存儲(chǔ)器，可以多種方式劃分為程序存儲(chǔ)器和數(shù)據(jù)存儲(chǔ)器。選擇DSP時(shí)，需要根據(jù)具體應(yīng)用對(duì)存儲(chǔ)空間大小以及對(duì)外部總線的要求來(lái)選擇。

ABB PFSK152 is a signal processor board commonly used in industrial control and automation systems. It is designed to process various types of signals and data to ensure that industrial automation systems can effectively monitor, control, and respond to different process variables, including temperature, pressure, flow, current, voltage, etc

The technical parameters of ABB PFSK152 are as follows:

Working voltage:+5V DC, ± 10%, maximum value 200mA.

EMC standard: IEC 1000-4-2 (limitations: industrial, second environment).

Working temperature:+0~+60 ° C.

Working humidity: Maximum relative humidity of 95% (non condensing).

Pollution level (IEC 60721-3-3): Chemical gas 3C3 level, solid particle 3S3 level

The performance of an SP is influenced by its ability to manage storage subsystems. As mentioned earlier, MAC and other signal processing functions are the basic capabilities of DSP device signal processing, and the fast MAC execution capability requires reading one instruction word and two data words from memory in each instruction cycle. There are multiple ways to achieve this reading. For example, using multi interface memory (allowing multiple access to memory within each instruction cycle), separating instruction and data memory (Harvard structure and its derived classes), and instruction caching (allowing instructions to be read from the cache instead of memory, thus freeing up memory for data reading), also pay attention to the size of supported memory space. The main target market for many fixed-point DSPs is embedded application systems, where the memory is generally small, so this type of DSP device has small to medium on-chip memory (around 4K to 64K words) and is equipped with a narrow external data bus. In addition, the address bus of the vast majority of fixed-point DSPs is less than or equal to 16 bits, resulting in limited external memory space. Some floating-point DSPs have very small or even no on-chip memory, but their external data bus is wide. For example, TI's TMS320C30 only has 6K on-chip memory, and the external bus is a 24 bit and 13 bit external address bus. The ADSP2-21060 of ADI has a 4Mb on-chip memory, which can be divided into program memory and data memory in various ways. When selecting a DSP, it is necessary to choose based on the specific application's storage space size and external bus requirements.

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