Datasheet HT82M39A Datasheet (Holtek Semiconductor Inc)

3D PS/2 Mouse Controller

Feature

Microsoft Intelli 3D PS/2 and IBM PS/2

·

mouse compatible
Supports rolling buttons in PS/2 mouse

·

mode
X/Y axis photo input with built-in Holtek¢s

·

special dynamic photo-input resistor
Supports three buttons and three axis (X,

·

Y, Z) inputs

General Description

The HT82M39A is a Plug and Play PS/2 3D
mouse controller. It is compatible with
Microsoft Intelli 3D PS/2 mouse. The Z axis can

Pin Assignment

HT82M39A

Z axis can support two kinds of scroller input

·

(optomechanical and mechanical)
2MHz RC oscillator for system frequency

·

with an external pull-high resistor
16-pin DIP

·

support two kinds of scroller input, namely;
optomechanical and mechanical.

Z1

Z2

VDD

NC

VSS

OSCI

CLK

DATA

16

1

15

2

14

3

13

4

12

5

11

6

10

7

9

8

H T82M 39A

16 D IP

Y2

Y1

X2

X1

TEST

LB

R0

RB

1 August 5, 1999

HT82M39A

Pin Description

Pin No. Pin Name I/O Description

1, 2 Z1, Z2 I

3 VDD I Positive power supply pin

4 NC No connection

5 VSS I Negative power supply pin

6 OSCI I

7 CLK I/O

8 DATA I/O

9~11 RB, RO, LB I

12 TEST I For IC manufacture testing, user should leave it floating.

13~16 X1, X2, Y1, Y2 I

²Z² axis input supports two kinds of scroller input; optomechanical
and mechanical.

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

²CLK I/O²: PS/2 mouse CLK line. NMOS open drain output with
5kW pull-high resistor.

²DATA I/O²: 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.

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

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 August 5, 1999

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HT82M39A

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

3 August 5, 1999

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

HT82M39A

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

·

Mouse mode changes between Standard and
3D PS/2 mode

Sending the commands in the following se
quence will set the mouse to 3D PS/2 mode.

Command Response From Mouse

F3h FAh

C8h FAh

F3h FAh

64h FAh

F3h FAh

50h FAh

F2h FAh, 03h

¨

Any time the PC sends a reset ²FFh² com­mand 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 YV XV YS XS 1 Ro 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 August 5, 1999

Timing Diagrams

X, Y axis photo-coupler crossed width

X1 (Y1)

X2 (Y2)

t

p

tr, tp, tf > 2 0ms

X/Y/Z axis counting

X1

X2

+1 +1 +1+1

Z1

Z2

+1 +1 -1 -1

t

r

t

f

-1 -1 -1 -1

HT82M39A

5 August 5, 1999

PS/2 mouse

·

Data output

HT82M39A

(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

DATA Start Bit Bit 0 Parity Bit Stop Bit

1st

CLK

T3 T4

T1

Tim ing Param eter

D A TA transition to the falling edge of C LK

R ising edge of C LK to D A TA 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 in im u m tim e to in h ib it M O U S E a fte r c lo c k 1 1

M O U SE 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/T 4-5 msec

30/50 msec

30/50 msec

>0 msec

<50 msec

(6 )

T6

(5 ) (7 )

11th
CLK

(6 )

(8 )

Tim ing Param eter

T7 C LK D uration, low

T8 CLK Duration, high

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

MOUSE samples DATA line

M in./M ax.

30/50 msec

30/50 msec

5/25 msec

6 August 5, 1999

Application Circuits

HT82M39A Z axis optomechanical (this application circuit is for reference only)

1.5kW

IR

100kW

51kW

100k

H T82M 39A

W

DATA

CLK

3

4

5

6

7

8

VSS

OSCI

CLK

DATA

NC

2

1

Z1

Z2

VDD

51k

W

120k

W

HT82M39A

RB

9

S3

1.5k

W

Ro

10

S2

TEST

X1

LB

12

11

S1

IR

Y2

Y1

X2

16

15

14

13

0.1m F

IR

V

CC

7 August 5, 1999

HT82M39A Z axis optomechanical (this application circuit is for reference only)

1.5kW

IR

DATA

CLK

120k

W

H T82M 39A

8

VSS

OSCI

CLK

DATA

NC

2

1

Z1

Z2

VDD

3

4

5

6

7

HT82M39A

RB

9

S3

1.5k

W

Ro

10

S2

TEST

X1

LB

12

11

S1

IR

Y2

Y1

X2

16

15

14

13

0.1m F

IR

V

CC

8 August 5, 1999

HT82M39A Z axis mechanical (this application circuit is for reference only)

EVZV X C 00112B

Encoder

DATA

CLK

120k

W

H T82M 39A

8

VSS

OSCI

CLK

DATA

NC

2

1

Z1

Z2

VDD

3

4

5

6

7

HT82M39A

RB

9

S3

1.5k

W

Ro

10

S2

TEST

X1

LB

12

11

S1

IR

Y2

Y1

X2

16

15

14

13

0.1m F

IR

V

CC

9 August 5, 1999

HT82M39A

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 Microelectronics Enterprises Ltd.

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

Copyright Ó 1999 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.

10 August 5, 1999

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