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.

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