Datasheet HT82M98A Datasheet (Holtek Semiconductor Inc)

Features

·

Complete Universal Serial Bus specs V1.0 compatibility

·

Serial Bus Interface Engine (SIE)

·

USB transceiver

·

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

·

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)

General Description

HT82M98A is a 3D mouse controller especially designed for USB and PS/2 applications. The HT82M98A can support the USB Standard Re quest as well as HID Class Request version 1.0 draft 4. It is compatible with Microsoft Intelli 3D PS/2 mouse. The X/Y axis photo input with built-in Holtek¢s special dynamic photo-input resistor and Z axis can support two kinds of

HT82M98A

3D USB+PS2 Mouse

·

Single chip solution especially for USB mouse function

·

Halt function and wake-up feature reduce power consumption

·

Plug and Play functions

·

Minimal external components

·

6MHz crystal oscillator for system clock

·

18-pin DIP package

-

scroller input, namely; optomechanical and mechanical. It requires minimal external com ponents to implement 3D USB plus PS/2

mouse. It can be briefly described as a Holtek 8-bit mC with an on-chip USB interface logic. The USB is specified by the Universal Serial

Bus Specification V1.0.

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1 June 14, 2000

Block Diagram

HT82M98A

USBD+

USBD

-

V33O

OSC1

OSC2

Pin Assignment

VSS

1

V33O

USBD+/CLK

USBD-/D A T A

RESET

2

3

4

5

X1

6

X2

7

Y1

8

Y2

9

H T82M 98A

18 D IP

USB

Transceiver

USB

Receiver

USB

Transm itter

Voltage

R egulator

Clock

G enerator

RC

RESET

18

17

16

15

14

13

12

11

10

OSC1

OSC2

VDD

LED

M

R

L

Z2

Z1

R egister

Set

USB Serial

Interface Engine

(S IE )

and

C ontrol

Logic

M ain

State m achine

Suspension

C ontrol

Holtek

8-bit

M ic ro c o n tro lle r

FIFO s´2

VDD

VSS

2 June 14, 2000

Pin Description

Pin No. Pin Name I/O Description

USB Interface (2 pins)

3

4

General purpose I/O (9 pins)

6, 7 X1, X2 I

8, 9 Y1, Y2 I

10, 11 Z1, Z2 I

12, 13, 14

Miscellaneous (7 pins)

1 VSS

2 V33O O 3.3V voltage output

5 RESET

15 LED I/O Drives LED output

16 VDD

17 OSC2 O 6MHz OSC output

18 OSC1 I 6MHz OSC input

USBD+/ CLK

USBD-/ DATA

L, R, M I

USB data plus or PS2 Clock, F/W auto-detect USBD+ for USB, CLK

I/O

for PS2

USB data minus or PS2 Data, F/W auto-detect USB- for USB, DATA

I/O

for PS2

X-axis photo input with built-in Holtek's special dynamic photo in put resistor

Y-axis photo input with built-in Holtek's special dynamic photo in put resistor

Z-axis input supports two kinds of scroller input; optomechanical and mechanical

Input ports with pull-high resistor. These pads can function as Left, Right and Middle button input lines.

Negative power supply, ground.

¾

I Chip reset input, low active

5V positive power supply

¾

HT82M98A

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3 June 14, 2000

Absolute Maximum Ratings

HT82M98A

Supply Voltage .................................-0.3V to 6V

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

USB Input Voltage .......V

-0.3V to VDD+0.3V

SS

-0.3V to V

SS

33O

+0.3V

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

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

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.

D.C. Characteristics

Ta=25°C

Test Conditions

Symbol Parameter

V

I

V

I

DD

STB

IL1

IH1

IL2

IH2

IH3

POR

OL1

OH1

OL2

Operating Voltage

Operating Current (Crystal OSC)

Standby Current 5V

Input Low Voltage for I/O Ports

Input High Voltage for mC I/O Ports

Input Low Voltage (RESET

)

Input High Voltage (RESET

)

Input High Voltage for USB I/O Ports

Power on Reset V Detection Voltage

Output Port Sink Current 5V

Output Port Source Current

Output Port Sink Current (LED)

DD

V

DD

Conditions

¾¾

5V

No load,

=6MHz

f

SYS

USB mode

PS/2 mode

No load, system HALT

5V

3.3V

5V

V

=0.5V

OL

=4.5V

V

OL

=4.5V

V

OL

¾

Min. Typ. Max. Unit

4.5

¾

¾¾

0

3.5

0

3.5

2.8

3.5

¾

¾-4 ¾

¾

10

3

¾

4

50

5.5 V

mA

¾

mA

¾

250

mA

1.0 V

5V

1.5 V

5V

3.6 V

3.9 V

mA

¾

mA

¾

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4 June 14, 2000

HT82M98A

A.C. Characteristics

Symbol Parameter

f

SYS

t

WDTosc

t

WDT

t

PWRT

t

OST

Note: t

System Clock (Crystal OSC) 5V

Watchdog Oscillator

Watchdog Time-out Period (RC OSC)

Power-up Timer Period

Oscillation Start-up Timer Period

=1/f

SYS

Test Conditions

Min. Typ. Max. Unit

V

DD

¾¾

Conditions

¾

0 6000

80 100 120

768 1024 1280 ms

¾¾ ¾10¾

Power-up or wake-up

¾

form HALT

¾

1024

¾

Ta=25°C

kHz

ms

t

SYS

5 June 14, 2000

Application Circuits

This application circuit is for reference only

1.5k

W

RECEPT_A

4

RECEPT_A

3

4

1M

0.1mF

1k

W

1M

0.1mF

1k

W

HT82M98A

V

CC

2

3

1

VSS

2

V33O

3

USBD+/CLK

4

USBD-/D A T A

5

RESET

6

X1

7

X2

8

Y1

9

Y2

H T 82M 98A

2

1

VSS

2

V33O

3

USBD+/CLK

4

USBD-/D A T A

5

RESET

6

X1

7

X2

8

Y1

9

Y2

H T82M 98A

OSC1

OSC2

VDD

LED

Z2

Z1

OSC1

OSC2

VDD

LED

Z2

Z1

18

6M H z

17

16

15

14

M

13

R

12

L

11

10

1k

W

V

CC

18

6M H z

17

16

15

14

M

13

R

12

L

11

10

10k

Encoder

W

EVZV X C 00112B

6 June 14, 2000

HT82M98A

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (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: 852-2-745-8288 Fax: 852-2-742-8657

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.

7 June 14, 2000

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