What is DSP?

DSP chip, also known as digital signal processor, is a microprocessor especially suitable for digital signal processing operation. Its host application is to realize various digital signal processing algorithms in real time and quickly. According to the requirements of digital signal processing, DSP chips generally have the following main characteristics:

(1) One instruction cycle can complete one multiplication and one addition;

(2) The program and data space are separated, and instructions and data can be accessed at the same time;

(3) There is fast RAM in the chip, which can be accessed in two blocks simultaneously through independent data bus;

(4) Hardware supports loop and jump with low or no overhead;

(5) fast interrupt handling and hardware I/O support;

(6) having a plurality of hardware address generators operating in a single cycle;

(7) Multiple operations can be executed in parallel;

(8) Support pipeline operation, so that operations such as fetching, decoding and execution can overlap.

Of course, compared with general microprocessor, other general functions of DSP chip are relatively weak.