HT82M91A Datasheet, PDF (1/6 Pages) Holtek Semiconductor Inc – 3D USB Mouse

HT82M91A
3D USB Mouse
Features
· _{Complete Universal Serial Bus specifica-}
tion 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 in-}
put (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 espe-
cially designed for USB applications. The
HT82M91A can support the USB Standard Re-
quest 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
USBD+
USBD-
V 33O
USB
T r a n s c e iv e r
USB
R e c e iv e r
USB
T r a n s m itte r
V o lta g e
R e g u la to r
R e g is te r
S et
U S B S e r ia l
In te r fa c e E n g in e
(S IE )
and
C o n tro l
L o g ic
H o lte k
8 - b it
M ic r o c o n tr o lle r
O SC1
O SC2
C lo c k
G e n e ra to r
RC
RESET
M a in
S ta te m a c h in e
F IF O s ´ 2
S uspend
VDD
C o n tro l
VSS
1
January 28, 2000