General Description
HT82M21A is a 3D mouse controller especially designed for USB and PS/2 applications. The HT82M21A can support the USB Standard Request as well as HID Class Request version 1.1. It is compatible with Microsoft Intelli 3D PS/2 mouse. The Z-axis can support two kinds of scroller input, namely; optomechanical and mechanical. It requires minimal external components to implement 3D USB plus PS/2 optical mouse. It can be briefly described as a Holtek 8-bit MCU with an on-chip USB interface logic. The USB is specified by the Universal Serial Bus Specification V1.1.

Features
*Operating voltage: 4.4V~5.25V
*Complete Universal Serial Bus specs V1.1 compatibility
*Serial Bus Interface Engine (SIE)
*USB transceiver
*Microsoft 3D Intelli mouse and IBM PS/2 mouse compatible
*Supports three buttons (R, M, L) and Z-axis input
*Z-axis can support two kinds of scroller input (optomechanical and mechanical)
*Single chip solution especially for USB mouse function
*HALT function and wake-up feature reduce power consumption
*Plug and Play functions
*Minimal external components
*6MHz crystal oscillator for system clock
*Interface compliant with ADNS-2051, ADNS-2610 and ADNS-2620
*Pass WHQL, USB-IF and EMC testing
*18-pin DIP package

 

HT82M21A - 3-Key 3D USB+PS/2 Optical Mouse Controller