Datasheet HT82M398A Datasheet (Holtek Semiconductor Inc)

WIN2000 3D PS/2 Mouse Controller

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 Holtek¢s

·

special dynamic photo-input resistor

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

Pin Assignment

HT82M398A

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

·

and IBM PS/2 mouse. The Z axis can support
two kinds of scroller input, namely; mechanical
and optomechanical.

-

Z1

Z2

VDD

B5

VSS

OSCI

CLK

DATA

H T82M 398A

1

2

3

4

5

6

7

8

16 D IP

Y2

16

Y1

15

X2

14

X1

13

B4

12

LB

11

R0

10

RB

9

1 February 22, 2000

Pin Description

Pin No. Pin Name I/O Description

1, 2 Z1, Z2 I

3 VDD

4B5 I

5 VSS

6 OSCI I

7 CLK I/O

8 DATA I/O

9~11 RB, RO, LB I

12 B4 I

13~16 X1, X2, Y1, Y2 I

Z, axis input supports two kinds of scroller input, namely;
optomechanical and mechanical.

Positive power supply

¾

Button 5, normal pull-low (50kW), Press connect to high.

Negative power supply

¾

2MHz RC oscillator for system frequency with external pull-high
resistor and built-in Capacitor.

CLK I/O, PS/2 mouse CLK line. NMOS open drain output with 5kW
pull-high resistor.

DATA I/O, PS/2 mouse DATA line. NMOS open drain output with
5kW pull-high resistor.

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.

Button 4, normal pull-low (50kW), Press connect to high.

X/Y axis photo input with built-in Holtek¢s special dynamic photo
input resistor

HT82M398A

Absolute Maximum Ratings

Supply Voltage..............................-0.3V to 6.5V

Input Voltage.................V

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum Ratings² 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.

-0.3V to VDD+0.3V

SS

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-25°Cto70°C

2 February 22, 2000

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HT82M398A

Electrical Characteristics

Symbol Parameter

V

DD

I

OP

f

OSC

V

IL1

V

IH1

V

IL2

V

IH2

R

PH2

Isink Sink Current (CLK, DATA) 5V

V

IL3

V

IH3

R

PL3

V

IL4

V

IH4

R

PL5

Operating Voltage

Operating Current 5V

RC Oscillator 5V

Input Low Voltage (Z1, Z2) 5V

Input High Voltage (Z1, Z2) 5V

Input Low Voltage (CLK, DATA) 5V

Input High Voltage (CLK, DATA) 5V

Pull-high Resistor (CLK, DATA) 5V

Input Low Voltage (RB, Ro, LB) 5V

Input High Voltage (RB, Ro, LB) 5V

Pull-low Resistor (RB, Ro, LB) 5V

Input Low Voltage (X1,X2,Y1,Y2) 5V

Input High Voltage (X1, X2, Y1, Y2) 5V

Dynamic Photo-resistor
(X1, X2, Y1, Y2, Z1, Z2)

Test Conditions

Conditions

V

DD

¾¾

=120kW¾¾

R

OSC

=120kW

R

OSC

¾

¾

¾

¾

V

=0V

IL

V

=0.4V

OH

¾

¾

V

=0V

IL

¾

¾

5V

¾

Ta=25°C

Min. Typ. Max. Unit

4.5 5.0 5.5 V

15 mA

1.6 2 2.2 V

0

2.2

0

2.0

2510

4

0

1.8

3.0 60 125

0

2.2

1.5 V

¾

¾

¾

¾

5V

0.8 V

5.0 V

¾¾

1.0 V

¾

¾

¾

¾

5V

1.5 V

5V

kW

mA

kW

See Dynamic resistor

characteristics

Dynamic resistor characteristics

·

R-V curve

R

Photo_R: R-V

V

3 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

HT82M398A

·

Data format for 5-button Wheel Mouse

BitNo.76 543210

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 ²FFh² 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.

-

-

-

·

Data format for 3D PS/2
Variable rps, 0, 8, 1, bidirectional, synchronous

BitNo.76 543210

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 2¢s complement

The z data report is 8-bit 2¢s complement

4 February 22, 2000

Timing Diagrams

X, Y axis photo-coupler cross width

X1 (Y1)

X2 (Y2)

t

r

tr, tp, tf > 2 0ms

X/Y/Z axis counting

X1

X2

+1 +1 +1+1

Z1

Z2

+1 +1 -1 -1

HT82M398A

t

p

t

f

-1 -1 -1 -1

5 February 22, 2000

PS/2 mouse

·

Data output

HT82M398A

(1 ) (3 ) (3 ) (3 ) (3 ) (4 )

CLK

(2 )

D A T A S ta rt B it B it 0

T1

T2

T3

T4
T5

T 6 M a x im u m tim e to in h ib it M O U S E a fte r c lo c k 1 1 to e n s u re

·

Data input

(1 )

CLK

D A T A S ta rt B it B it 0 P a r ity B it S to p B it

1st

CLK

T3 T4

T1

Tim in g P aram eter

D A T A transition to the falling edge of C LK

R ising edge of C LK to D ATA transition

In a c tiv e C L K D u ra tio n

A c tiv e C L K D u ra tio n
M inim um tim e to inhibit M O U S E after clock 11

M O U S E does not start another transm ission

(4 )

(2 )

I/O

Inhibit

(3 )

2nd

CLK

T2

1st
CLK

T7 T8

2nd

CLK

T9

(5 ) (7 )

Parity Bit

9th

CLK

10th
CLK

(5 )

10th
CLK

11th
CLK

T5

Stop Bit

M in ./M a x .

5/25 msec

5/T4-5 msec

30/50 msec

30/50 msec

>0 msec

<50 msec

(6 )

T6

(5 ) (7 )

11th
CLK

(6 )

(8 )

Tim in g P aram eter

T7 CLK Duration, low

T8 CLK Duration, high

T9 T im e from low to high C LK transition to tim e w hen

MOUSE samples DATA line

M in ./M ax.

30/50 msec

30/50 msec

5/25 msec

6 February 22, 2000

Application Circuits

HT82M398A Z axis optomechanical (this application circuit is for reference only)

0.1mF

1.5k

IR

W

120k

W

HT82M398A

V

CC

IR

S5

CLK

DATA

1

Z1

2

Z2

3

VDD

4

B5

5

VSS

6

OSCI

7

CLK

8

DATA

H T82M 398A

Y2

Y1

X2

X1

B4

LB

Ro

RB

16

15

14

13

12

11

10

9

S4

S1

S2

S3

HT82M398A Z axis mechanical (this application circuit is for reference only)

0.1mF

120k

W

Encoder

EV ZV X C 00112B

CLK

DATA

S5

1

Z1

2

Z2

3

VDD

4

B5

5

VSS

6

OSCI

7

CLK

8

DATA

H T82M 398A

Y2

Y1

X2

X1

B4

LB

Ro

RB

16

15

14

13

12

11

10

9

S4

S1
S2

S3

IR

IR

1.5k

1.5k

V

W

IR

W

CC

7 February 22, 2000

HT82M398A

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Fax: [phone] (International sales hotline)

Holtek Semiconductor (Hong Kong) Ltd.

RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]

Copyright Ó 2000 by HOLTEK SEMICONDUCTOR INC.

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek
assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are
used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications
will be suitable without further modification, nor recommends the use of its products for application that may pres
ent a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior
notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

8 February 22, 2000

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