DESCRIPTION
How the most common optical sensor for mouse works today is: The sensor captures "snapshots" of the work surface at 1,700 times per second, calculates ±3-pixel movement per frame, and produce 5,100 pixel movements per second with internal 6MHz oscillator. However, the key difference in ATA2188 from other optical sensors is that it is designed based on a system level architecture so that it can eliminate side parts resulting in saving extra manufacturing costs. Additionally, PS/2 interface is included within ATA2188 so that no MCU is needed to interface through PS/2. ATA2188 also tolerates all different magnitudes of movement so that the sensor can be used for design purpose where accuracy is the most important factor as well as for gaming purpose where speed would be the critical factor. The sensor is in a 12-pin optical DIP type and comes with the default resolution of 600 or 800 counts per inch (CPI) and the speed of motion is up to either 12.75 inches per second running at 6MHz or 25 inches per second at 12MHz (“fast”).
