Avago Adnk-5003 Guide

ADNK-5003

Optical Mouse Designer’s Kit

Design Guide

Introduction

The Universal Serial Bus (USB) is an industry standard se-

rial interface between a computer and peripherals such

as a mouse, joystick, keyboard, etc. This design guide

describes how a cost-eective USB optical mouse can be

built using the Avago Technologies ADNS-5000 optical

sensor. The document starts with the basic operations

of a computer mouse peripheral followed by an intro-

duction to the Avago Technologies ADNS-5000 Optical

Navigation Sensor. A schematic of the ADNS-5000 optical

sensor and buttons of a standard mouse can be found in

Appendix A. The ADNS-5000 data sheet is available from

the Avago Technologies web site at www.avagotech.com.

USB documentation can be found at the USB Implement-

ers Forum web site at www.usb.org.

The ADNS-5000 navigation sensor along with the ADNS-

5100 round lens or ADNS-5100-001 trim lens, ADNS-5200

clip and HLMP-ED80 LED form a complete and compact

mouse tracking system. There are no moving parts, which

means high reliability and less maintenance for the end

user. In addition, precision optical alignment is not re-

quired, facilitating high volume assembly.

Optical Mouse Basics

The optical mouse measures changes in position by opti-

cally acquiring sequential surface images (frames), and

mathematically determining the direction and magni-

tude of movement. The Z-wheel movement is done in the

traditional method by decoding the quadrature signal

generated by optical sensors. This design guide shows

how to connect to and manage a standard conguration

of mouse hardware, as well as handle the USB protocols

as a standard way of reporting mouse movement and

button presses to the PC.

Optical Navigation Sensor

Avago Technologies ADNS-5000 optical sensor is used in

this reference design as the primary navigation engine.

This Optical Navigation Technology contains an Image

Acquisition System, a Digital Signal Processor and USB

stream output.

The IAS acquires microscopic surface images via the lens

and illumination system provided by the ADNS-5100,

ADNS-5200, and HLMP-ED80-XX000. These images are

processed by the DSP to determine the direction and

distance of motion. The DSP generates the ∆x and ∆y

relative displacement values which are converted to USB

motion data.

Mouse Z-Wheel

The motion of Z-wheel is detected using the traditional

method by decoding the quadrature signal generated by

optical sensors:

For mechanical Z-wheels the following must be imple-

mented.

1. Use a rotary switch equivalent to the Panasonic part

EVQVX at http://industrial.panasonic.com/www-

data/pdf/ATC0000/ATC0000CE20.pdf (The key point

is stable “A” switch state in all detent positions).

2. Solder the rotary switch into the PCB such that the

common pin is closest to the cable end of the mouse.

(Metal plate faces to left)

3. Connect the “A” terminal of the rotary switch to “ZA”

and the “B” terminal to “ZB”. ZA MUST be connected

to“Signal A”in Figure 2 where the z-wheel detents are

mechanically stable.

As shown in Figure 2 below, traveling along the quadra-

ture signal to the right produces a unique set of state

transitions, and traveling to the left produces another set

of unique state transitions.

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Figure 2. Optics Quadrature Signal Generation

Mouse Buttons

Mouse buttons are connected as standard switches.

These switches are pulled up by the pull up resistors

inside the sensor. When the user presses a button, the

switch will be closed and the pin will be pulled LOW to

GND. A LOW state at the pin is interpreted as the button

being pressed. A HIGH state is interpreted as the button

has been released or the button is not being pressed.

Normally the switches are debounced in rmware for 9-

17ms. In this reference design there are three switches:

left, Z-wheel and right.

GND

VDD3

VDD3 VDD5

OPT 1

+3.3V Vdd 5V

OPT 0

C4 C5

C3 GND

LED_GND

NAV LED

OSC IN

OSC OUT

Vdd 5V

Vdd V5

Mechanical

Z_wheel

3.3V

USB D+

D-

D+

C1, C2, C3 = 0.1uF

C4 = 4.7uF

C5 = 3.3 uF

1.5k

+3.3V

or B5 or B4

USB D−

ADNS-5000

12 11

Figure 1. ADNS-5000 3 button Optical Mouse Hardware Block Diagram

Some details on ADNK-5003

The ADNK-5003 reference design mouse unit allows us-

ers to evaluate the performance of the Optical Tracking

Engine (sensor, lens, LED assembly clip, LED) over a USB

protocol. This kit also enables users to understand the

recommended mechanical assembly. (See Appendix C

and D)

System Requirements

PCs using WindowsNT/ Windows2000 with standard

3-button USB mouse driver loaded.

•Functionality

•3-button, scroll wheel mouse.

•Operating (For USB Mode)

•Hot pluggable with USB port. The PC does not need

to be powered o when plugging or unplugging the

evaluation mouse.

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To Disassemble the ADNK-5003 Unit

The ADNK-5003 comprises of the plastic mouse casing,

printed circuit board (PCB), lens, buttons, and USB cable.

(See Figure 3) Unscrewing the one screw located at the

base of the unit can open the ADNK-5003 unit. Lifting

and pulling the PCB out of the base plate can further

disassemble the mouse unit.

Figure 4. Distance from lens reference plane to surface

Figure 3. Exploded view drawing of optical tracking engine with ADNS-5000 optical mouse sensor.

While reassembling the components, please make sure

that the Z height (Distance from lens reference plane to

surface) is valid. The Z-height is from 2.3 to 2.5mm with

a nominal of 2.4mm. Refer to Figure 4.

Sensor

LENS

OBJECT SURFACE

Caution: The lens is not permanently attached to the

sensor and will drop out of the assembly.

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Regulatory Requirements

Passes FCC B and worldwide analogous emission limits

when assembled into a mouse with unshielded cable and

following Avago Technologies recommendations.

Passes EN61000-4-4/IEC801-4 EFT tests when assembled

into a mouse with shielded cable and following Avago

Technologies recommendations.

•UL ammability level UL94 V-0.

Provides sucient ESD creepage/clearance distance

to avoid discharge up to 15kV when assembled into a

mouse according to usage instructions above.

Sensor

The sensor technical information is contained in the

ADNS-5000 Data Sheet.

Lens

The lens technical information is contained in the ADNS-

5100 Data Sheet. The ange on the standard ADNS-5100

lens is for ESD protection.

LED Assembly Clip

The information on the assembly clip is contained in the

ADNS-5200 Data Sheet.

LED

The LED technical information is contained in the HLMP-

ED80 Data.

Base Plate Feature – IGES File

The IGES le on the CD-ROM provides recommended

base plate molding features to ensure optical alignment.

This includes PCB assembly diagrams like solder xture

in assembly and exploded view, as well as solder plate.

See Appendix D for details.

Reference Design Documentation – Gerber File

The Gerber File presents detailed schematics used in

ADNK-5003 in PCB layout form. See Appendix C for more

details.

Overall circuit

A schematic of the overall circuit is shown in Appendix A

of this document. Appendix B lists the bill of materials.

USB Interface

All USB Human Interface Device (HID) class applications

follow the same USB start-up procedure. The procedure

is as follows

1. Device Plug-in

When a USB device is rst connected to the bus, it is

powered and running rmware, but communications on

the USB remain non-functional until the host has issued

a USB bus reset.

2. Bus Reset

The pull-up resistor on D– noties the hub that a device

has just been connected. The host recognizes the pres-

ence of a new USB device and initiates a bus reset to

that device.

3. Enumeration

The host initiates SETUP transactions that reveal general

and device specic information about the mouse. When

the description is received, the host assigns a new and

unique USB address to the mouse. The mouse begins

responding to communication with the newly assigned

address, while the host continues to ask for information

about the device description, conguration description

and HID report description. Using the information re-

turned from the mouse, the host now knows the number

of data endpoints supported by the mouse. At this point,

the process of enumeration is completed.

USB Jumper Table

Below is the USB jumper table for ADNS-5000 sensor for

both 3 button and 5 button USB mouse. Both mouse

type will have dierent VID and PID strings. Also note the

connections for OPT0 and OPT1.

Mouse

Type VID PID

Manufacturing

String

Product

String B1 B2 B3 OPT0 OPT1 ZA ZB

button

0x192F 0x0116 “ “ USB Optical

Mouse

sw1 sw2 sw3 Vdd3 Vdd3 Mech

Z-wheel

Mech

Z-wheel

button

0x192F 0x0216 “ “ USB Optical

Mouse

sw1 sw2 sw3 sw4 sw5 Mech

Z-wheel

Mech

Z-wheel

Table 1. USB Strap (Jumper) Table

The PID/string strap matrix is the following:

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Appendix A: Schematic Diagram of the Overall Circuit

Figure A1. Circuit-level block diagram for ADNK-5003 designer’s kit optical mouse using the Avago Technologies ADNS-5000 optical mouse

GND

VDD3

VDD3 VDD5

OPT 1

+3.3V Vdd 5V

OPT 0

C4 C5

C3 GND

LED_GND

NAV LED

OSC IN

OSC OUT

Vdd 5V

Vdd V5

Mechanical

Z_wheel

3.3V

USB D−

USB D+

D-

D+

C1, C2, C3 = 0.1uF

C4 = 4.7uF

C5 = 3.3 uF

1.5k

+3.3V

or B5 or B4

GND

VDD3

VDD3 VDD5

OPT 1

+3.3 V Vdd 5V

OPT 0

C4 C5

C3 GND

LED_GND

NAV LED

OSC IN

OSC OUT

Vdd 5V

Vdd V5

Mechanical

Z_wheel

USB D−

USB D+

D-

D+

C1, C2, C3 =

0.1uF

C4 = 4.7uF

C5 = 3.3 uF

1.5k

+3.3 V

59.0 K

59.0 L

59.0 M

59.0 N

59.0 to 66.5 P

59.0 to 78.7 Q

59.0 to 93.1 R

59.0 to 110

59.0 to 143 T

R1 value

(ohm)

LED Bin

ADNS-5000

12 11

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Appendix B: Bill of Materials for Components Shown on schematic

Part Type Designator Footprint Description

59R R8 AXIAL0.4 Resistor

750R R7 AXIAL0.4 Resistor

1k R3 AXIAL0.4 Resistor

1k R1 AXIAL0.4 Resistor

1.5k R9 AXIAL0.4 Resistor

10k R2 AXIAL0.4 Resistor

10k R4 AXIAL0.4 Resistor

22k R5 AXIAL0.4 Resistor

22k R6 AXIAL0.4 Resistor

100nF C4 RAD0.1 Capacitor

100nF C3 RAD0.1 Capacitor

100nF C5 RAD0.1 Capacitor

3.3uF/16V C1 RB.2/.4 Capacitor

4.7uF/16V C2 RB.2/.4 Capacitor

Photo Transistor LQ1 DIP Sensor

PN2222A Q2 TO-92 TRANSISTOR NPN General Purpose Amplier

PN2222A Q1 TO-92 TRANSISTOR NPN General Purpose Amplier

24MHz K1 DIP Crystal

A5000 U1 DIP18 IC Mouse Sensor

HEADER 5 H1 HEADLOCK5P FRICTION LOCKED

JUMPER-3 J1 JUMPER PIN HEADER 2.54mm

JUMPER-3 J2 JUMPER PIN HEADER 2.54mm

LED D1 DIP LED

NAV LED D2 DIP LED

SW SPDT SW1 DIP Switch

SW SPDT SW2 DIP Switch

SW SPDT SW3 DIP Switch

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Appendix C: PCB Layout

Figure C1. PCB Schematic (Bottom Layer)

Figure C2. PCB Schematic (Top Overlay)

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For product information and a complete list of distributors, please go to our web site: www.avagotech.com

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.

AV02-1139EN - September 8, 2008

Appendix D: Base Plate Feature

Appendix E: Kit Components

The designer’s kit contains components as follows:

Part Number Description Name Quantity

ADNK-5003 Reference Design Mouse Mouse 1

ADNS-5000 Solid-State Optical Mouse Sensor Sensor 5

ADNS-5100 Round Lens Plate Lens 5

ADNS-5100-001 Trim Lens Plate Lens 5

ADNS-5200 LED Assembly Clip LED Clip 5

HLMP-ED80-XX000 LED LED 5

ADNK-5003 CD Includes Documentation and Support Files for ADNK-5003

Documentation

a. ADNS-5000 Optical Mouse Sensor Data Sheet

b. ADNS-5100 Round Lens and ADNS-5100-001 Trim Lens Data Sheet

c. ADNS-5200 LED Assembly Clip

d. HLMP-ED80-XX000 LED Data Sheet

Hardware Support Files

a. ADNK-5003 BOM List

b. ADNK-5003 Schematic

c. 3D Model IGES Files

d. Gerber File

Figure D1. Overall view of base plate

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Table of contents

Other Avago Mouse manuals