HT82M91A

HT82M91A 3D USB Mouse Features · · · · · Complete Universal Serial Bus specification compatibility Serial Bus Interface Engine (SIE) USB transceiver Supports three buttons (R, M, L) and three axes (X, Y, Z) 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 Has plug and Play functions Minimal external components 6MHz crystal oscillator for system clock 18-pin DIP package General Description HT82M91A is a 3D mouse encoder chip especially designed for USB applications. The HT82M91A can support the USB Standard Request as well as HID Class Request version 1.0. It can be briefly described as a Holtek 8-bit mC with an on-chip USB interface logic. It can use minimal external components to implement three key-switches and four photo-coupler mouse. The USB is specified by the Universal Serial Bus Specification. Block Diagram U S B T r a n s c e iv e r U S B R e c e iv e r U S B In te rfa c (S a C o L o S e r ia l e E n g in e IE ) n d n tro l g ic R e g is te r S e t U S B D + U S B D - U S B T r a n s m itte r H o lte k 8 - b it M ic r o c o n tr o lle r V 3 3 O V o lta g e R e g u la to r O S C 1 O S C 2 C lo c k G e n e ra to r M a in S ta te m a c h in e F IF O s ´ 2 R C R E S E T S u s p e n d C o n tro l V D D V S S 1 January 28, 2000 HT82M91A Pin Assignment V S S 1 2 3 4 5 6 7 8 9 V 3 3 O U S B D + U...