How to set the DSP inside the photoelectric mouse

Someone asked online:

How is the DSP set in the photoelectric mouse?

The Optical Mouse is usually composed of the following parts: optical sensor, optical lens, light emitting diode, interface microprocessor, touch button, roller, connection, PS/2 or USB interface, housing, etc. The optical sensor consists of a CMOS photosensitive block (a photosensitive component used on a low-end camera) and a DSP. The CMOS photosensitive block is used to collect and receive the light transmitted by the optical lens at the bottom of the mouse (and synchronously imaging ), the CMOS photosensitive block then submits the image generated by one frame to its internal DSP for computation and comparison. By comparing the image, you can locate the position of the mouse. So I would like to ask if the DSP processor inside the mouse is connected with the CMOS sensor or the processing chip inside the mouse is connected? In fact, this question seems to be irrelevant. In fact, it is all connected by a circuit. I want to ask if the DSP processor has a different effect from the processing chip inside the mouse? Is it part of the chip or an independent part? Another problem is that we know that scanners and photocopiers use CMOS or CCD image sensors, and many sensors are combined, so which CMOS or CCD is each sensor equipped with a DSP processor or all the sensor information is aggregated to a DSP processor for processing? Is a DSP processor sufficient?

Best Answer:

Is the DSP processor in the mouse connected to the CMOS sensor or the processing chip in the mouse connected? -- The so-called CMOS sensor inside the mouse is a very simple optical CMOS device, which is separated from the chip. In fact, this question seems to be irrelevant. In fact, it is all connected by a circuit. I want to ask if the DSP processor has a different effect from the processing chip inside the mouse? -- The mouse contains an integrated chip. The Digital Signal Processing Unit (DSP) inside is mainly used to identify the moving direction of the image, but its scale is not large. It is a DSP image judgment process, it only requires a small amount of computing power. The DSP determines the movement direction and speed based on the adjacent image, and then transmits the data to the computer through the USB or PS2 interface. Is it part of the chip or an independent part? -- This part and USB (PS2) Communication, optical device acceptance, and other functions are generally integrated into the same chip, the light emitting tube generally has an independent driver, if you are interested, check the internal logic of the mouse control chip. Another problem is that we know that scanners and photocopiers use CMOS or CCD image sensors, and many sensors are combined, so which CMOS or CCD is each sensor equipped with a DSP processor or all the sensor information is aggregated to a DSP processor for processing? Is a DSP processor sufficient? -- These digital signal processing requires a very small amount of computing, and the processing capability of a single chip is sufficient.