HT82M21A
3-Key 3D USB+PS/2 Optical Mouse Controller
Features
·
Operating voltage: 4.4V~5.25V
·
Complete Universal Serial Bus specs V1.1
·
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
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
and ADNS-2620
·
Pass WHQL, USB-IF and EMC testing
·
18-pin DIP package
(optomechanical and mechanical)
·
Single chip solution especially for USB mouse
function
General Description
HT82M21A is a 3D mouse controller especially de-
signed 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
Univer-
sal Serial Bus Specification V1.1.
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
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
V 3 3 O
V o lta g e
R e g u la to 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
H o lte k
8 - b it
M ic r o c o n tr o lle 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 s io n
C o n tro l
V D D
V S S
Rev. 1.40
1
September 15, 2005
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
