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HT82M23A/HT82M23B/HT82M23C

3/5-Key USB+PS/2 Optical Mouse Controller

Features

Operating voltage: 4.4V~5.25V

Compatible with Microsoft Windows 2000 and

HALT function and wake-up feature reduce power

consumption

Plug and Play functions

Minimal external components

6MHz crystal oscillator for system clock

Interface compliant with ADNS-2051, ADNS-2610

5-button Wheel Mouse

Microsoft 3D Intelli mouse and IBM PS/2 mouse

compatible

Supports 3/5 buttons and Z-axis input

Z-axis can support two kinds of scroller input

and ADNS-2620

Pass WHQL, USB-IF and EMC testing

HT82M23A is pin compatible with HT82M22A

HT82M23B/HT82M23C is pin compatible with

(optomechanical and mechanical)

3 key or 5 key mode can be selected by package

Complete Universal Serial Bus specs V2.0

compatibility

Serial Bus Interface Engine (SIE)

USB transceiver

Single chip solution especially for USB mouse

HT82M21A

HT82M23A: 20-pin DIP/SOP package

HT82M23B/HT82M23C: 18-pin DIP/SOP package

function

General Description

HT82M23A/HT82M23B/HT82M23C is a Plug and Play

Windows 2000 and 5-button 3D USB+PS/2 Mouse con-

troller. The HT82M23A/HT82M23B/HT82M23C can

support the USB Standard Request as well as HID Class

Request version 1.1. It is compatible with Microsoft Intelli

3D or Windows 2000 5 key PS/2 mouse. The Z-axis can

support two kinds of scroller input, namely; mechanical

and optomechanical. It requires minimal external com-

ponents to implement 3D or Windows 2000 5 key USB

plus PS/2 mouse. All its features combined and make

up this versatile Holtek 8-bit MCU with an on-chip USB

interface logic. The USB is specified by the Universal

Serial Bus Specification V2.0.

The USB vendor ID for HT82M23A/HT82M23B/

HT82M23C is defined as 04D9H, the USB product ID is

different by different package

Selection Table

Part No.

HT82M23A

HT82M23B

HT82M23C

Interface

USB and PS/2

USB only

Mode

Windows 2000

USB Product ID

048EH

0499H

Package

20DIP/SOP

18DIP/SOP

Rev. 1.10

January 22, 2007

HT82M23A/HT82M23B/HT82M23C

Block Diagram

U S B

T r a n s c e iv e r

U S B

R e c e iv e r

R e g is te r

S e t

U S B D +

U S B D

U S B

T r a n s m itte r

V 3 3 O

V o lta g e

R e g u la to r

U S B

In te rfa c

C o

L o

S e r ia l

e E n g in e

IE )

n d

n tro l

g ic

H o lte k

8 - b it

M ic r o c o n tr o lle r

O S C 1

O S C 2

C lo c k

G e n e ra to r

R C

R E S E T

M a in

S ta te m a c h in e

S u s p e n s io n

C o n tro l

F IF O s

V D D

V S S

Pin Assignment

V S S

1 0

V 3 3 O

U S B D + /C L K

U S B D

/D A T A

R E S E T

S E L 1

S D IO

S C L K

S E L 0

R B 0

2 0

1 9

1 8

1 7

1 6

Z 2

Z 1

R B 1

1 5

1 4

1 3

1 2

1 1

O S C 1

O S C 2

V D D

L E D

V S S

V 3 3 O

U S B D + /C L K

U S B D

/D A T A

R E S E T

S E L 1

S D IO

S C L K

S E L 0

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

1 0

Z 2

Z 1

O S C 1

O S C 2

V D D

L E D

H T 8 2 M 2 3 A

2 0 D IP -A /S O P -A

H T 8 2 M 2 3 B /H T 8 2 M 2 3 C

1 8 D IP -A /S O P -A

Rev. 1.10

January 22, 2007

HT82M23A/HT82M23B/HT82M23C

Pin Description

Pin Name

VSS

V33O

USBD+/CLK

USBD-/DATA

RESET

I/O

Negative power supply, ground

3.3V voltage output

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

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

Chip reset input, low active

Configuration selections

SEL1=0: Z-axis is divided by 2 (default)

SEL1=1: Z-axis is divided by 4

For ADNS 2051:

SEL0=0: 800DPI (default)

SEL0=1: 400DPI

For ADNS 2610/2620:

SEL0=0, 400DPI (default)

SEL0=1, 800DPI-by firmware

Serial data for Agilent sensor IC SDIO

Serial data for Agilent sensor IC SCLK

Click button detection. Input ports with 30kW pull-high resistor.

Input ports with pull-high resistor. These pads can function as Left, Right, Middle, B4 and B5

button input lines.

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

Drives LED output

5V positive power supply

6MHz OSC output

6MHz OSC input

Description

SEL1

SEL0

SDIO

SCLK

RB0, RB1

L, R, M

Z1, Z2

LED

VDD

OSC2

OSC1

I/O

Absolute Maximum Ratings

Supply Voltage ..............................V

-0.3V

to V

+6V

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

-0.3V

to V

+0.3V

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

-0.3V

to V

33O

+0.3V

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute

Maximum 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 exposure to extreme conditions may affect device reliabil-

ity.

Storage Temperature ............................-50°C to 125°C

Operating Temperature...........................-25°C to 70°C

Rev. 1.10

January 22, 2007

HT82M23A/HT82M23B/HT82M23C

D.C. Characteristics

Symbol

SUS

IL1

IH1

IL2

IH2

POR

Parameter

Operating Voltage

Operating Current

(Crystal OSC)

USB Suspend Mode

Input Low Voltage

(Z1, Z2, L, M, R)

Input High Voltage

(Z1, Z2, L, M, R)

Input Low Voltage (RESET)

Input High Voltage (RESET)

Built-in Power on Reset V

Detection Voltage

Sink Current (LED)

Test Conditions

=0.8V

No load,

SYS

=6MHz

Conditions

USB mode

PS/2 mode

Min.

4.4

3.5

Typ.

3.7

Max.

5.25

250

1.0

1.5

Ta=25°C

Unit

No load, system HALT

A.C. Characteristics

Symbol

SYS

Parameter

System Clock (Crystal OSC)

Test Conditions

Conditions

Min.

Typ.

6000

Max.

Ta=25°C

Unit

kHz

Note: t

SYS

=1/f

SYS

Timing Diagram

Z-axis Photo-Coupler Crossed Width

Z 1

Z 2

N o te :

F o r Z - a x is

, t

> 1 m s

Z-axis Counting

Z 1

Z 2

+ 1

-1

Rev. 1.10

January 22, 2007

HT82M23A/HT82M23B/HT82M23C

Functional Description

PS/2 Mouse

PS/2 status byte

Command

F3h

C8h

F3h

64h

F3h

50h

F2h

Response From Mouse

FAh

FAh, 03h

Byte 1

Bit 7: Reserved

Bit 6: 0=Stream Mode, 1=Remote Mode

Bit 5: 0=Disabled, 1=Enabled

Bit 4: 0=Scaling 1:1, 1=Scaling 2:1

Bit 3: 1=Wrap Mode, 0=Stream or Remote

(different from IBM specs.)

Bit 2: 1=Left Button Pressed

Bit 1: 1=Middle Button Pressed

Bit 0: 1=Right Button Pressed

For HT82M23A, mouse mode changes between

Byte 2

Bit 0~7 current resolution setting

(Bit 0=LSB)

Standard and Windows 2000 PS/2 mode.

Sending the commands in the following sequence will

set the mouse to Windows 2000 PS/2 mode.

Command

F3h

C8h

F3h

C8h

F3h

50h

F2h

Response From Mouse

FAh

FAh, 04h

Byte 3

Bit 0~7 current sampling rate (Bit 0=LSB)

Standard PS/2 data format (HT82M23A/HT82M23B)

Bit No.

1st word

2nd word

3rd word

Data format for 3D PS/2 (HT82M23A/HT82M23B)

Any time the PC sends a reset

²FFh²

command to

the mouse, it will reset the mouse to Standard PS/2

mode.

Bit No.

1st word

2nd word

3rd word

4th word

Note:

After power-on reset is initiated, the mouse is set to

Standard PS/2 mode.

USB mouse data format for 3D mod

(HT82M23A/HT82M23B/HT82M23C)

Bit No.

1st word

2nd word

3rd word

4th word

The X/Y data report is 9-bit 2¢s complement

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

Data format for 5-button Wheel Mouse (HT82M23A)

Bit No.

1st word

2nd word

3rd word

4th word

Note:

Data format for Windows 2000 mode (HT82M23A)

Bit No.

1st word

2nd word

3rd word

4th word

Note:

RB1 RB1 M

RB1 RB0 Z3

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 negative

Button status: 1=pressed, 0=released

X- movement towards the right is positive, mov-

ing towards the left is negative

Y- upward movement is negative, moving down

is positive

Z- rolling towards the user is negative, else positive

Button status: 1=pressed, 0=released

For HT82M23A/HT82M23B, mouse mode changes

between Standard and 3D PS/2 mode.

Sending the commands in the following sequence will

set the mouse to 3D PS/2 mode.

Rev. 1.00

January 12, 2006