HT82M398A
WIN2000 3D PS/2 Mouse Controller
Pin Assignment
1
February 22, 2000
Features
Compatible with Microsoft Windows 2000
and 5-button Wheel Mouse
Compatible with Microsoft Intelli 3D PS/2
and IBM PS/2 mouse
Supports rolling buttons in PS/2 mouse
mode
X/Y axis photo input with built-in Holteks
special dynamic photo-input resistor
Supports three buttons and three axes
(X, Y, Z) inputs
Z axis can support two kinds of scroller in-
put (optomechanical and mechanical)
2MHz RC oscillator for system frequency
with external pull-high resistor
16-pin DIP package
General Description
The HT82M398A is a Plug and Play WIN2000
and 5-button 3D PS/2 mouse controller. It is
also compatible with Microsoft Intelli 3D PS/2
and IBM PS/2 mouse. The Z axis can support
two kinds of scroller input, namely; mechanical
and optomechanical.
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
1
2
3
4
5
6
7
8
Y 2
Y 1
X 2
X 1
B 4
L B
R 0
R B
Z 1
Z 2
V D D
B 5
V S S
O S C I
C L K
D A T A
H T 8 2 M 3 9 8 A
1 6 D I P
Pin Description
Pin No.
Pin Name
I/O
Description
1, 2
Z1, Z2
I Z, axis input supports two kinds of scroller input, namely;
optomechanical and mechanical.
3
VDD
Positive power supply
4
B5
I Button 5, normal pull-low (50kW), Press connect to high.
5
VSS
Negative power supply
6
OSCI
I 2MHz RC oscillator for system frequency with external pull-high
resistor and built-in Capacitor.
7
CLK
I/O CLK I/O, PS/2 mouse CLK line. NMOS open drain output with 5kW
pull-high resistor.
8
DATA
I/O DATA I/O, PS/2 mouse DATA line. NMOS open drain output with
5kW pull-high resistor.
9~11
RB, RO, LB
I
Right Button: Normal pull-low (50kW),
Pressing the button connects to high.
Rolling Button: Normal pull-low (50kW),
Pressing the button connects to high.
Left Button: Normal pull-low (50kW),
Pressing the button connects to high.
12
B4
I Button 4, normal pull-low (50kW), Press connect to high.
13~16
X1, X2, Y1, Y2
I X/Y axis photo input with built-in Holteks special dynamic photo
input resistor
Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 6.5V
Storage Temperature.................-50C to 125C
Input Voltage.................V
SS
-0.3V to V
DD
+0.3V
Operating Temperature ..............-25C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maxi-
mum Ratings may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged expo-
sure to extreme conditions may affect device reliability.
HT82M398A
2
February 22, 2000
Electrical Characteristics
Ta=25C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
4.5
5.0
5.5
V
I
OP
Operating Current
5V R
OSC
=120kW
15
mA
f
OSC
RC Oscillator
5V R
OSC
=120kW
1.6
2
2.2
V
V
IL1
Input Low Voltage (Z1, Z2)
5V
0
1.5
V
V
IH1
Input High Voltage (Z1, Z2)
5V
2.2
5
V
V
IL2
Input Low Voltage (CLK, DATA)
5V
0
0.8
V
V
IH2
Input High Voltage (CLK, DATA)
5V
2.0
5.0
V
R
PH2
Pull-high Resistor (CLK, DATA)
5V V
IL
=0V
2
5
10
kW
Isink
Sink Current (CLK, DATA)
5V V
OH
=0.4V
4
mA
V
IL3
Input Low Voltage (RB, Ro, LB)
5V
0
1.0
V
V
IH3
Input High Voltage (RB, Ro, LB)
5V
1.8
5
V
R
PL3
Pull-low Resistor (RB, Ro, LB)
5V V
IL
=0V
3.0
60
125
kW
V
IL4
Input Low Voltage (X1,X2,Y1,Y2)
5V
0
1.5
V
V
IH4
Input High Voltage (X1, X2, Y1, Y2) 5V
2.2
5
V
R
PL5
Dynamic Photo-resistor
(X1, X2, Y1, Y2, Z1, Z2)
5V
See Dynamic resistor
characteristics
Dynamic resistor characteristics
R-V curve
HT82M398A
3
February 22, 2000
Photo_R: R-V
V
R
HT82M398A
4
February 22, 2000
Functional Description
PS/2 mouse
PS/2 status byte
Byte 1
bit
7: Reserved
6: 0=Stream Mode, 1=Remote Mode
5: 0=Disabled, 1=Enabled
4: 0=Scaling 1:1, 1=Scaling 2:1
3: 1=Wrap Mode, 0=Stream or Remote
(different from IBM specs.)
2: 1=Left Button Pressed
1: 1=Middle Button Pressed
0: 1=Right Button Pressed
Byte 2
Bit 0~7 current resolution setting
(Bit 0=LSB)
Byte 3
Bit 0~7 current sampling rate (Bit 0=LSB)
Standard PS/2 data format
Variable rps, 0, 8, 1, bidirectional, synchronous
Bit No.
7
6
5
4
3
2
1
0
1st word YV XV YS XS 1 M R
L
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
Data format for 3D PS/2
Variable rps, 0, 8, 1, bidirectional, synchronous
Bit No.
7
6
5
4
3
2
1
0
1st word
0
0 YS XS 1 M R
L
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
4th word Z7 Z6 Z5 Z4 Z3 Z2 Z1 Z0
The x/y data report is 9-bit 2s complement
The z data report is 8-bit 2s complement
Data format for 5-button Wheel Mouse
Bit No.
7
6
5
4
3
2
1
0
1st word
0
0 YS XS 1 M R
L
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
4th word 0
0 B5 B4 Z3 Z2 Z1 Z0
X movement towards the right is positive, mov-
ing towards the left is negative
Y upward movement is positive, moving down
is negative
Z rolling towards the user is positive, else nega-
tive
Button status: 1=pressed, 0=released
5-button Wheel Mouse Mode follows the
5-button Activation Method of Windows 2000
and the 5-button Wheel Mouse Specification.
Any time the PC sends a reset FFh com-
mand to the mouse, it will reset the mouse
to Standard PS/2 mode.
After power-on reset is initiated, the mouse
is set to Standard PS/2 mode.
Timing Diagrams
X, Y axis photo-coupler cross width
X/Y/Z axis counting
HT82M398A
5
February 22, 2000
X 1 ( Y 1 )
X 2 ( Y 2 )
t
r
t
f
t
p
t
r
, t
p
, t
f
> 2 0
m
s
X 1
X 2
+ 1
+ 1
+ 1
+ 1
- 1
- 1
- 1
- 1
Z 1
Z 2
+ 1
+ 1
- 1
- 1
PDF 
ZIP