HT82M980A
5-Key 3D WIN2000 USB+PS/2 Mouse Controller
Features
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Operating voltage: 4.4V~5.25V
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Compatible with Microsoft Windows 2000 and
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Z axis can support two kinds of scroller input
(optomechanical and mechanical)
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Single chip solution especially for USB mouse
5-button Wheel Mouse
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Complete Universal Serial Bus specs V1.1
function
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HALT function and wake-up feature reduce power
compatibility
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Serial Bus Interface Engine (SIE)
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USB transceiver
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Microsoft 3D Intelli mouse and IBM PS/2 mouse
consumption
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Plug and Play functions
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Minimal external components
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6MHz crystal oscillator for system clock
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20-pin DIP package
compatible
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Supports five buttons and three axes input
General Description
HT82M980A is a Plug and Play Windows 2000 and
5-button 3D USB+PS/2 Mouse controller. The
HT82M980A 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 X/Y axis photo
input with built-in Holtek壟s special dynamic photo-input
resistor and Z axis can support two kinds of scroller in-
put, namely; mechanical and optomechanical. It re-
quires minimal external components to implement 3D
USB plus PS/2 mouse. All its features combined and
make up this versatile 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
R C
R E S E T
M a in
S ta te m a c h in e
S u s p e n s io n
C o n tro l
F IF O s
麓
2
V D D
V S S
Rev. 1.40
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February 10, 2003
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