ADNS-6090 - Avago Technologies

ADNS-6090

Gaming Laser Mouse Sensor

Data Sheet

Features

x High speed motion detection – up to max of 65ips

and 20g

x LaserStream architecture for greatly improved optical

navigation technology

x Programmable frame rate over 7200 frames per

second

x SmartSpeed self-adjusting frame rate for optimum

performance

x Serial port burst mode for fast data transfer

x 800/1200/1600/2000/2400/3000cpi selectable

resolution

x Single 3.3 volts power supply

x Four-wire serial port along with Power Down and

Reset pins

x Laser fault detect circuitry on-chip

Applications

x Laser mice for game consoles and computer games

x Laser mice for desktop PC’s, Workstations, and

portable PC’s

x Laser trackballs

x Integrated input devices

Description

The Avago Technologies ADNS-6090 sensor along with

the ADNS-6120 or ADNS-6130-001 lens, ADNS-6230-001

clip and ADNV-6340 laser diode form a complete and

compact laser mouse tracking system. It is the laser il-

luminated gaming mouse system enabled for high per-

formance navigation. Driven by Avago’s LaserStream

Technology, it can operate on many surfaces that prove

dicult for traditional LED-based optical navigation.

It’s high performance architecture is capable of sensing

high-speed mouse motion - with resolution up to

1600 counts per inch, velocities up to max of 65 inches

per second and acceleration up to 20g. This sensor is

powered for the high sensitive user.

There is no moving part in the complete assembly for

ADNS-6090 laser mouse system, thus it is high reliabil-

ity and less maintenance for the end user. In additional,

precision optical alignment is not required, facilitating

high volume assembly.

Theory of Operation

The ADNS-6090 is based on LaserStream technol-

ogy, which measures changes in position by optically

acquiring sequential images (frames) and mathematically

determining the direction and magnitude of movement.

ADNS-6090 contains an Image Acquisition System (IAS), a

Digital Signal Processor (DSP), and a four wire serial port.

The IAS acquires microscopic surface images via the lens

and illumination system. These images are processed

by the DSP to determine the direction and distance of

motion. The DSP calculates the Δx and Δy relative dis-

placement values.

An external microcontroller reads the Δx and Δy infor-

mation from the sensor serial port. The microcontroller

then translates the data into PS2 or USB signals before

sending them to the host PC or game console.

Pinout

Pin Name Description

1 NCS Chip select (active low input)

2 MISO Serial data output (Master In/Slave Out)

3 SCLK Serial clock input

4 MOSI Serial data input (Master Out/Slave In)

5 NC No Connection

6 RESET Reset input

7 NPD Power down (active low input)

8 OSC_OUT Oscillator output

9 GUARD Oscillator GND for PCB guard (optional)

10 OSC_IN Oscillator input

11 REFC Reference capacitor

12 REFB Reference capacitor

13 RBIN Binning Resistor to set XY_LASER

current

14 XY_LASER LASER current output

15 NC No Connection

16 VDD3 Supply voltage

17 GND Ground

18 VDD3 Supply voltage

19 GND Ground

20 LASER_

NEN

Laser enable (active low)

Figure 1. Package outline drawing (top view)

CAUTION: It is advised that normal static precautions be taken in handling and assembly

of this component to prevent damage and/or degradation which may be induced by ESD.

Figure 2. Package outline drawing

Overview of Laser Mouse Sensor Assembly

Figure 3. Assembly drawing of ADNS-6090 (top, front and cross-sectional view)

Shown with ADNS-6120 Laser Mouse Lens, ADNS-6230-

001 VCSEL Assembly Clip and ADNV-6340 VCSEL. The

components interlock as they are mounted onto dened

features on the base plate.

The ADNS-6090 laser mouse sensor is designed for

mounting on a through-hole PCB, looking down. There is

an aperture stop and features on the package that align

to the lens.

The ADNV-6340 VCSEL provides a laser diode with a

single longitudinal and a single transverse mode. It is par-

ticularly suited as lower power consumption and highly

coherent replacement of LEDs. It also provides wider

operation range while still remaining within single-mode,

reliable operating conditions.

The ADNS-6120 or ADNS-6130-001 Laser Mouse Lens

is designed for use with ADNS-6090 sensor and the illu-

mination subsystem provided by the assembly clip and

the VCSEL. Together with the VCSEL, the ADNS-6120 or

ADNS-6130-001 lens provides the directed illumination

and optical imaging necessary for proper operation of

the Laser Mouse Sensor. ADNS-6120 and ADNS-6130-

001 are precision molded optical component and should

be handled with care to avoid scratching of the optical

surfaces. ADNS-6120 also has a large round ange to

provide a long creepage path for any ESD events that

occur at the opening of the base plate.

The ADNS-6230-001 VCSEL Assembly Clip is designed to

provide mechanical coupling of the ADNV-6340 VCSEL

to the ADNS-6120 or ADNS-6130-001lens. This coupling

is essential to achieve the proper illumination alignment

required for the sensor to operate on a wide variety of

surfaces.

Avago Technologies provides an IGES le drawing de-

scribing the base plate molding features for lens and PCB

alignment.

Figure 4. Exploded view drawing

2D Assembly Drawing of ADNS-6090, PCBs and Base Plate

ADNS-6090 (sensor)

Customer Supplied PCB

ADNS-6120 (round lens)*

Customer Supplied Base Plate

With Recommended Features

Per IGES Drawing*

* or ADNS-6130-001 trim lens

Customer Supplied VCSEL PCB

ADNV-6340 (VCSEL)

ADNS-6230-001 (clip)

Assembly Recommendation

1. Insert the sensor and all other electrical components

into the application PCB (main PCB board and VCSEL

PCB board).

2. Wave Solder the entire assembly in a no-wash

solder process utilizing a solder xture. The solder

xture is needed to protect the sensor during the

solder process. It also sets the correct sensor-to -PCB

distance, as the lead shoulders do not normally rest

on the PCB surface. The xture should be designed to

expose the sensor leads to solder while shielding the

optical aperture from direct solder contact.

3. Place the lens onto the base plate.

4. Remove the protective kapton tape from the optical

aperture of the sensor. Care must be taken to keep

contaminants from entering the aperture.

Figure 5. Recommended PCB mechanical cutouts and spacing

5. Insert the PCB assembly over the lens onto the base

plate. The sensor aperture ring should self-align to the

lens. The optical position reference for the PCB is set

by the base plate and lens. Note that the PCB motion

due to button presses must be minimized to maintain

optical alignment.

6. Remove the protective kapton tape from the VCSEL.

7. Insert the VCSEL assembly into the lens.

8. Slide the clip in place until it latches. This locks the

VCSEL and lens together.

9. Install the mouse top case. There must be a feature in

the top case (or other area) to press down onto the

sensor to ensure the sensor and lens are interlocked to

the correct vertical height.

Design considerations for improving ESD Performance

For improved electrostatic discharge performance,

typical creepage and clearance distance are shown in the

table below. Assumption: base plate construction as per

the Avago supplied IGES le for ADNS-6120 round lens.

Typical Distance Millimeters

Creepage 12.0

Clearance 2.1

The lens ange can be sealed (i.e. glued) to the base

plate. Note that the lens material is polycarbonate

and therefore, cyanoacrylate based adhesives or other

adhesives that may damage the lens should NOT be

used.

Laser Bin Table

Bin Number Rbin Resistor Value (kohm)

2A 18.7

3A 12.7

Figure 6. Cross section of PCB assembly

Figure 7. Schematic Diagram for 3-Button Scroll Wheel USB PS/2 Mouse - Regulator Bypass

USB Microcontroller

Vcc

GND

Vreg

GND

13 XTALOUT

*Outputs configured

as open drain if NOT

using level shifter

VCSEL

P0.5*

P0.4*

P0.7*

P0.6

P1.4

P0.2

P0.0

P0.3

P1.5

VPP

R4 20K

Vcc

P1.0

P1.1

P1.2

P1.3

P1.6

P1.7

P0.1

R3 20K

ADNS-6090

Vcc

Rbin

Selected to

match laser

RBIN

24 MOSI

SCLK

MISO

20K

NCS

3RESET

NPD

20K

10 K

R10

10 K

24 MHz

OSC_OUT

OSC_IN

GUARD

REFC

REFB

0.1

2.2

LASER_NEN

XY_LASER

2N3906

0.1

GND

VDD3

Vout Vin

Gnd

+3.3V

4.7

0.1

4.7

Vcc

LP2950ACZ-3.3

3.3V Regulator

Vcc

SW4

ALPS

EC10E

Scroll wheel encoder

SCLK

VCC

___

____

HLD

GND

R7 100K

0.1

N/C

D-/SDAT

D+/SCLK

XTALIN/P2.1

Vcc

VBUS

D+

D-

USB Port

1.30K

0.1

Buttons SW2

SW1

SW3

middle

right

left

25LC160A 16KBit EEPROM (optional)

2.7K

C10

470pF

Murata

CSALS24MOX53-B0

Optional

Ground

Plane

16 18

0.1

74VHC125 Level Shifter

Hi-Z Configuration

C10 to be as close as

possible to VCSEL

Notes

x Caps for pins 11, 12, 16 and 18 MUST have trace lengths LESS than 5

mm on each side.

x Pins 16 and 18 caps MUST use pin 17 GND.

x Pin 9, if used, should not be connected to PCB GND to reduce

potential RF emissions.

x The 0.1 μF caps must be ceramic.

x Caps should have less than 5 nH of self inductance.

x Caps should have less than 0.2 Ω ESR.

x NC pins should not be connected to any traces.

x Surface mount parts are recommended.

x Care must be taken when interfacing a 5V microcontroller to the

ADNS-6090. Serial port inputs on the sensor should be connected

to open-drain outputs from the microcontroller or use an active

drive level shifter. NPD and RESET should be connected to 5V

microcontroller outputs through a resistor divider or other level

shifting technique.

x V

DD3 and GND should have low impedance connections to the

power supply.

x Because the RBIN pin sets the XY_LASER current, the following PC

board layout practices should be followed to reduce the chance

of uncontrolled laser drive current caused from a leakage path

between RBIN and ground. One hypothetical source of such a

leakage path is PC board contamination due to a liquid, such as a

soft drink, being deposited on the printed circuit board.

x The RBIN resistor should be located close to the sensor pin 13. The

traces between the resistor and the sensor should be short.

x The pin 13 solder pad and all exposed conductors connected to pin

13 should be surrounded by a guard trace connected to VDD3 and

devoid of solder mask.

x The pin 13 solder pad, the traces connected to pin 13, and the RBIN

resistor should be covered with a conformal coating.

x The RBIN resistor should be a thru-hole style to increase the distance

between its terminals. This does not apply if a conformal coating is

used.

IMAGE

PROCESSOR

REFERENCE

VOLTAGE

FILTER NODE

3.3 V POWER

REFB

REFC

GND

RESONATOR

OSC_IN

OSC_OUT

MOSI

NCS

SCLK

DD3

MISO

RESET

NPD

VOLTAGE REGULATOR

AND POWER CONTROL

Serial Port

CTRL

OSCILLATOR

LASER DRIVER

LASER_NEN

XY_LASER

RBIN

External PROM

The ADNS-6090 must operate from externally loaded

programming. This architecture enables immediate

adoption of new features and improved performance

algorithms. The external program is supplied by Avago

as a le, which may be burned into a programmable

device. The example application shown in this document

uses an EEPROM to store and load the external program

memory. A micro-controller with sucient memory may

be used instead. On power-up and reset, the ADNS-6090

program is downloaded into volatile memory using the

burst-mode procedure described in the Synchronous

Serial Port section. The program size is 1986 x 8 bits.

Figure 8. Block diagram of ADNS-6090 optical mouse sensor

LASER Drive Mode

The LASER has 2 modes of operation: DC and Shutter. In

DC mode, the LASER is on at all times the chip is powered

except when in the power down mode via the NPD pin.

In shutter mode the LASER is on only during the portion

of the frame that light is required. The LASER mode is

set by the LASER_MODE bit in the Conguration_bits

mends the default Shutter mode setting (except for cali-

bration and test).

Eye Safety

The ADNS-6090 and the associated components in the

schematic of Figure 7 are intended to comply with Class

1 Eye Safety Requirements of IEC 60825-1. Avago Tech-

nologies suggests that manufacturers perform testing to

verify eye safety on each mouse. It is also recommended

to review possible single fault mechanisms beyond those

described below in the section “Single Fault Detection”.

Under normal conditions, the ADNS-6090 generates the

drive current for the laser diode (ADNV-6340). In order to

stay below the Class 1 power requirements, resistor Rbin

must be set at least as high as the value in the bin table of

Figure 7, based on the bin number of the laser diode and

LP_CFG0 and LP_CFG1 must be programmed to appropri-

ate values. Avago recommends using the exact Rbin value

specied in the bin table to ensure sucient laser power

for navigation. The system comprised of the ADNS-6090

and ADNV-6340 is designed to maintain the output beam

power within Class 1 requirements over component man-

ufacturing tolerances and the recommended tempera-

ture range when adjusted per the procedure below and

when implemented as shown in the recommended ap-

plication circuit of Figure 7. For more information, please

refer to Application Note AN5088 on the eye safety calcu-

lation.

LASER Power Adjustment Procedure

1. The ambient temperature should be 25°C +/- 5°C.

2. Set VDD3 to its permanent value.

3. Ensure that the laser drive is at 100% duty cycle.

4. Program the LP_CFG0 and LP_CFG1 registers to

achieve an output power as close to 506uW as possible

without exceeding it.

Good engineering practices should be used to guarantee

performance, reliability and safety for the product design.

Avago has additional information and detail, such as

rmware practices, PCB layout suggestions, and manu-

facturing procedures and specications that could be

provided.

LASER Output Power

The laser beam output power as measured at the naviga-

tion surface plane is specied below. The following con-

ditions apply:

1. The system is adjusted according to the above

procedure.

2. The system is operated within the recommended

operating temperature range.

3. The VDD3 value is no greater than 50mV above its value

at the time of adjustment.

4. No allowance for optical power meter accuracy is

assumed.

Disabling the LASER

LASER_NEN is connected to the base of a PNP transistor

which when ON connects VDD3 to the LASER. In normal

operation, LASER_NEN is low. In the case of a fault

condition (ground at XY_LASER or RBIN), LASER_NEN

goes high to turn the transistor o and disconnect VDD3

from the LASER.

Single Fault Detection

ADNS-6090 is able to detect a short circuit, or fault,

condition at the RBIN and XY_LASER pins, which could

lead to excessive laser power output. A low resistance

path to ground on either of these pins will trigger the

fault detection circuit, which will turn o the laser drive

current source and set the LASER_NEN output high.

When used in combination with external components

as shown in the block diagram below, the system will

prevent excess laser power for a single short to ground at

RBIN or XY_LASER by shutting o the laser. Refer to the PC

board layout notes for recommendations to reduce the

chance of high resistance paths to ground existing due to

PC board contamination.

In addition to the continuous fault detection described

above, an additional test is executed automatically

whenever the LP_CFG0 register is written to. This test

will check for a short to ground on the XY_LASER pin, a

short to VDD3 on the XY_LASER pin, and will test the fault

detection circuit on the XY_LASER pin.

Parameter Symbol Minimum Maximum Units Notes

Laser output power LOP 716 μW Per conditions above

RBIN

LASER_NEN

XY_LASER

GND

ADNS-6090

LASER

DRIVER

VDD3

Microcontroller

RESET

NPD

voltage sense

current set

VDD3

fault control

block

Figure 9. Single Fault Detection and Eye-safety Feature Block Diagram

Absolute Maximum Ratings

Parameter Symbol Minimum Maximum Units Notes

Storage Temperature TS-40 85 °C

Operating Temperature TA-15 55 °C

Lead Solder Temp 260 °C For 10 seconds, 1.6mm below seating plane.

Supply Voltage VDD3 -0.5 3.7 V

ESD 2 kV All pins, human body model MIL 883

Method 3015

Input Voltage VIN -0.5 VDD3+0.5 V NPD, NCS, MOSI, SCLK, RESET, OSC_IN,

OSC_OUT, REFC, RBIN

Output current IOUT 7 mA MISO, LASER_NEN

Input Current IIN 15 mA XY_LASER current with RBIN 12.7KΩ

LP_CFG0=0x00; LP_CFG1=0xFF

Regulatory Requirements

x Passes FCC B and worldwide analogous emission limits when assembled into a mouse with shielded cable and

following Avago recommendations.

x Passes IEC-1000-4-3 radiated susceptibility level when assembled into a mouse with shielded cable and following

Avago recommendations.

x Passes EN61000-4-4/IEC801-4 EFT tests when assembled into a mouse with shielded cable and following Avago

recommendations.

x UL ammability level UL94 V-0.

Recommended Operating Conditions

Parameter Symbol Minimum Typical Maximum Units Notes

Operating Temperature TA040°C

Power supply voltage VDD3 3.10 3.30 3.60 Volts

Power supply rise time VRT 1 μs 0 to 3.0V

Supply noise

(Sinusoidal)

VNB 30

mV p-p 10kHz- 300KHZ

300KHz-50MHz

Oscillator Frequency fCLK 23 24 25 MHz Set by ceramic resonator

Serial Port Clock Frequency fSCLK 2

500

MHz

kHz

Active drive, 50% duty cycle

Open drain drive with pull-ups

on, 50 pF load

Resonator Impedance XRES 55 Ω

Distance from lens reference

plane to surface

Z 2.18 2.40 2.62 mm Results in +/- 0.22 mm

minimum DOF, see Figure 10

Speed S 45 65 in/sec Max limit is based on these

surfaces : White Paper, Photo

Paper, White Formica, Black

Formice, Spruce/White Pine

Acceleration A 20 g

Frame Rate FR 2000 7200 Frames/

second

See Frame_Period register

section

Resistor value for LASER Drive

Current set

Rbin See Laser Bin Table in Figure 7 kΩ Using ADNV-6340 VCSEL

Voltage at XY_LASER VXY_LASER 0.7 VDD3 V

Figure 10. Distance from lens reference plane to surface

VCSEL PCB

VCSEL

Sensor

Sensor PCB

Lens Surface

2.40

0.094

VCSEL Clip

AC Electrical Specications

Electrical Characteristics over recommended operating conditions. Typical values at 25 °C, VDD3=3.3V, fclk=24MHz.

Parameter Symbol Minimum Typical Maximum Units Notes

VDD to RESET tOP 250 μs From VDD = 3.0V to RESET sampled

Data delay after RESET tPU-RESET 180 ms From RESET falling edge to valid motion

data at 2000 fps and shutter bound 20k.

Input delay after reset tIN-RST 550 μs From RESET falling edge to inputs active

(NPD, MOSI, NCS, SCLK)

Power Down tPD 600 μs From NPD falling edge to initiate the power

down cycle at 2000fps (tPD = 1 frame period

+ 100μs)

Wake from NPD tPUPD tCOMPUTE 75 ms From NPD rising edge to valid motion data

at 2000 fps and shutter bound 8610. Max

assumes surface change while NPD is low

Data delay after NPD tCOMPUTE 3.1 ms From NPD rising edge to all registers contain

data from new images at 2000fps (See

Figure 11).

RESET pulse width tPW-RESET 10 μs

MISO rise time tr-MISO 40 200 ns CL = 50pF

MISO fall time tf-MISO 40 200 ns CL = 50pF

MISO delay after SCLK tDLY-MISO 120 ns From SCLK falling edge to MISO data valid,

no load conditions

MISO hold time thold-MISO 250 ns Data held until next falling SCLK edge

MOSI hold time thold-MOSI 200 ns Amount of time data is valid after SCLK

rising edge

MOSI setup time tsetup-MOSI 120 ns From data valid to SCLK rising edge

SPI time between

write commands

tSWW 50 PsFrom rising SCLK for last bit of the rst data

byte, to rising SCLK for last bit of the second

data byte.

SPI time between

write and read commands

tSWR 50 PsFrom rising SCLK for last bit of the rst data

byte, to rising SCLK for last bit of the second

address byte.

SPI time between read

and subsequent commands

tSRW

tSRR

250 ns From rising SCLK for last bit of the rst

data byte, to falling SCLK for rst bit of the

second address byte.

SPI read address-data delay tSRAD 50 PsFrom rising SCLK for last bit of the address

byte, to falling SCLK for rst bit of data

being read. All registers except Motion &

Motion_Burst

SPI motion read

address-data delay

tSRAD-MOT 75 PsFrom rising SCLK for last bit of the address

byte, to falling SCLK for rst bit of data

being read. Applies to 0x02 Motion, and

0x50 Motion_Burst, registers

NCS to SCLK active tNCS-SCLK 120 ns From NCS falling edge to rst SCLK rising

edge

SCLK to NCS inactive tSCLK-NCS 120 ns From last SCLK falling edge to NCS rising

edge, for valid MISO data transfer

NCS to MISO high-Z tNCS-MISO 250 ns From NCS rising edge to MISO high-Z state

PROM download and frame

capture byte-to-byte delay

tLOAD 10 Ps(See Figure 24 and 25)

NCS to burst mode exit tBEXIT 4PsTime NCS must be held high to exit burst

mode

Transient Supply Current IDDT 68 mA Max supply current during a VDD3 ramp

from 0 to 3.67 V

Input Capacitance C IN 14-22 pF OSC_IN, OSC_OUT

DC Electrical Specications

Electrical Characteristics over recommended operating conditions. Typical values at 25 °C, VDD3=3.3 V.

Parameter Symbol Minimum Typical Maximum Units Notes

DC Supply Current IDD_AVG 53 mA DC average at 7200 fps. No DC

load on XY_LASER, MISO.

Power Down Supply Current IDDPD 5 9 μA NPD=GND; SCLK, MOSI,

NCS=GND or VDD3;

RESET=VDD3

Input Low Voltage VIL 0.8 V SCLK, MOSI, NPD, NCS, RESET

Input High Voltage VIH 0.7 * VDD3 V SCLK, MOSI, NPD, NCS, RESET

Input hysteresis VI_HYS 200 mV SCLK, MOSI, NPD, NCS, RESET

Input current, pull-up disabled IIH_DPU 0 ±10 μA Vin = 0.8*VDD3, SCLK, MOSI,

NCS

Input current, CMOS inputs IIH 0 ±10 μA NPD, RESET, Vin=0.8*VDD3

Output current, pulled-up

inputs

IOH_PU 150 300 600 μA Vin = 0.2V, SCLK, MOSI, NCS;

See bit 2 in Extended_Cong

XY_LASER Current ILAS 146/Rbin AV

XY_LASER >= 0.7 V

LP_CFG0 = 0x00, LP_CFG1 =

0xFF

XY_LASER Current (fault mode) ILAS 500 μA Rbin < 50 Ohms, or VXY_LASER

<0.2V

Output Low Voltage, MISO,

LASER_NEN

VOL 0.6 V Iout=2mA, MISO

Iout= 1mA, LASER_NEN

Output High Voltage, MISO,

LASER_NEN

VOH 0.8*VDD3 V Iout=-2mA, MISO

Iout= -0.5mA, LASER_NEN

XY_LASER Current (no Rbin)I

LAS_NRB 1mAR

bin = open

Figure 11. NPD Rising Edge Timing Detail

LASER

CURRENT

(shutter mode)

Oscillator Start

NPD

250 us

Reset

Count

340 us

SCLK

Optional SPI transactions

with old image data

590 us

tCOMPUTE = 590us + 5 Frame Periods

“Motion” bit set if

motion was detected.

First read dX = dY = 0

Frame

Optional

Flash

Frame

Typical Performance Characteristics

Figure 12. Mean Resolution vs. Z (at 3000cpi setting)

Relationship of mouse count to distance = m (mouse count) / n (cpi)

Figure 13. Average error vs. Z (at 3000cpi setting)

Typical Path Deviation

Largest Single Perpendicular Deviation From A Straight Line At 45 Degrees

Path Length = 4 inches; Speed = 6 ips ; Resolution = 3000 cpi

1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2

Distance from Lens Reference Plane to Surface, Z (mm)

Maximum Distance (mouse count)

White Paper

Spruce/White Pine

Black Formica

Photo Paper

White Formica

Figure 14. Average Supply Current vs. Frame Rate

Figure 15. Wavelength Responsivity

Relative Responsivity for ADNS-6090

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

400 500 600 700 800 900 1000

Wavelength (nm)

Relative responsivity

33 40

100

120

0 1000 2000 3000 4000 5000 6000 7000 8000

Average Supply Current vs Frame Rate - VDD = 3.6V

Relative Current (%)

Frame Rate (Frames/second)

Synchronous Serial Port

The synchronous serial port is used to set and read parameters in the ADNS-6090, and to read out the motion informa-

tion. The serial port is also used to load PROM data into the ADNS-6090.

The port is a four wire port. The host micro-controller always initiates communication; the ADNS-6090 never initiates

data transfers. The serial port cannot be activated while the chip is in power down mode (NPD low) or reset (RESET

high). SCLK, MOSI, and NCS may be driven directly by a 3.3V output from a micro-controller, or they may be driven

by an open drain conguration by enabling on-chip pull-up current sources. The open drain drive allows the use of a

5V micro-controller without any level shifting components. The port pins may be shared with other SPI slave devices.

When the NCS pin is high, the inputs are ignored and the output is tri-stated.

The lines that comprise the SPI port are:

SCLK: Clock input. It is always generated by the master (the micro-controller.)

MOSI: Input data. (Master Out/Slave In)

MISO: Output data. (Master In/Slave Out)

NCS: Chip select input (active low). NCS needs to be low to activate the serial port; otherwise, MISO will be

high Z, and MOSI & SCLK will be ignored. NCS can also be used to reset the serial port in case of an

error.

Chip Select Operation

The serial port is activated after NCS goes low. If NCS is raised during a transaction, the entire transaction is aborted

and the serial port will be reset. This is true for all transactions including PROM download. After a transaction is

aborted, the normal address-to-data or transaction-to-transaction delay is still required before beginning the next

transaction. To improve communication reliability, all serial transactions should be framed by NCS. In other words,

the port should not remain enabled during periods of non-use because ESD and EFT/B events could be interpreted as

serial communication and put the chip into an unknown state. In addition, NCS must be raised after each burst-mode

transaction is complete to terminate burst-mode. The port is not available for further use until burst-mode is termi-

nated.

Write Operation

Write operation, dened as data going from the micro-controller to the ADNS-6090, is always initiated by the micro-

controller and consists of two bytes. The rst byte contains the address (seven bits) and has a “1” as its MSB to indicate

data direction. The second byte contains the data. The ADNS-6090 reads MOSI on rising edges of SCLK.

1 D

7 D

6 D

7 8 9 10 11 12 13 14 16

2 3 4 5 6

SCLK

MOSI

MOSI Driven by Micro-Controller

NCS

MISO

Figure 16. Write Operation

Read Operation

A read operation, dened as data going from the ADNS-6090 to the micro-controller, is always initiated by the micro-

controller and consists of two bytes. The rst byte contains the address, is sent by the micro-controller over MOSI, and

has a “0” as its MSB to indicate data direction. The second byte contains the data and is driven by the ADNS-6090 over

MISO. The sensor outputs MISO bits on falling edges of SCLK and samples MOSI bits on every rising edge of SCLK.

Figure 17. MOSI Setup and Hold Time

SCLK

MOSI

tsetup , MOSI

tHold,MOSI

Figure 18. Read Operation

Figure 19. MISO Delay and Hold Time

NOTE: The 250 ns minimum high state of SCLK is also the minimum MISO data hold time of the ADNS-6090. Since the

falling edge of SCLK is actually the start of the next read or write command, the ADNS-6090 will hold the state of data

on MISO until the falling edge of SCLK.

SCLK

MISO D0

tHOLD-MISO

tDLY-MISO

1 2 3 4 5 6 7 8

SCLK

Cycle #

SCLK

MOSI 0 A

6 A

5 A

4 A

3 A

2 A

1 A

9 10 11 12 13 14 15 16

MISO D

6 D

5 D

4 D

3 D

2 D

1 D

NCS

tSRAD delay

Required timing between Read and Write Commands (tsxx)

There are minimum timing requirements between read and write commands on the serial port.

Figure 20. Timing between two write commands

If the rising edge of the SCLK for the last data bit of the second write command occurs before the 50 microsecond

required delay, then the rst write command may not complete correctly.

SCLK

Address Data

tSWW > 50 μs

Write Operation

Address Data

Write Operation

−

Address Data

Write Operation

Address

Next Read

Operation

SCLK

SWR

 50 s

Figure 21. Timing between write and read commands

If the rising edge of SCLK for the last address bit of the read command occurs before the 50 microsecond required

delay, the write command may not complete correctly.

Next Read or

Write Operation

Data

SRAD

< 50 μs

for non-motion read

SRAD-MOT

< 75 μs

for register 0x02

Read Operation

Address

SRW

& t

SRR

>250 ns

Address

SCLK

−

Figure 22. Timing between read and either write or subsequent read commands

The falling edge of SCLK for the rst address bit of either the read or write command must be at least 250 ns after the

last SCLK rising edge of the last data bit of the previous read operation. In addition, during a read operation SCLK

should be delayed after the last address data bit to ensure that the ADNS-6090 has time to prepare the requested data.

Burst Mode Operation

Burst mode is a special serial port operation mode which may be used to reduce the serial transaction time for three

predened operations: motion read and PROM download and frame capture. The speed improvement is achieved

by continuous data clocking to or from multiple registers without the need to specify the register address, and by not

requiring the normal delay period between data bytes.

Motion Read

Reading the Motion_Burst register activates this mode. The ADNS-6090 will respond with the contents of the Motion,

Delta_X, Delta_Y, SQUAL, Shutter_Upper, Shutter_Lower and Maximum_Pixel registers in that order. After sending the

with no delay between bytes by driving SCLK at the normal rate. The data are latched into the output buer after the

last address bit is received. After the burst transmission is complete, the micro-controller must raise the NCS line for at

east tBEXIT to terminate burst mode. The serial port is not available for use until it is reset with NCS, even for a second

burst transmission.

−

Motion_Burst Register Address Read First Byte

First Read Operation Read Second Byte

SCLK

tSRAD-MOT < 75 μs

Read Third Byte

Figure 23. Motion burst timing.

PROM Download

This function is used to load the Avago-supplied rmware le contents into the ADNS-6090. The rmware le is an

ASCII text le with each 2-character byte on a single line.

The following steps activate this mode:

1. Perform hardware reset by toggling the RESET pin

2. Write 0x1D to register 0x14 (SROM_Enable register)

3. Wait at least 1 frame period

4. Write 0x18 to register 0x14 (SROM_Enable register)

5. Begin burst mode write of data le to register 0x60 (SROM_Load register)

After the rst data byte is complete, the PROM or micro-controller must write subsequent bytes by presenting the

data on the MOSI line and driving SCLK at the normal rate. A delay of at least tLOAD must exist between data bytes as

shown. After the download is complete, the micro-controller must raise the NCS line for at least tBEXIT to terminate

burst mode. The serial port is not available for use until it is reset with NCS, even for a second burst transmission.

Avago recommends reading the SROM_ID register to verify that the download was successful. In addition, a self-test

may be executed, which performs a CRC on the SROM contents and reports the results in a register. The test is initiated

by writing a particular value to the SROM_Enable register; the result is placed in the Data_Out register. See those

Avago provides the data le for download; the le size is 1986 data bytes. The chip will ignore any additional bytes

written to the SROM_Load register after the SROM le.

NCS

address key data address byte 0

MOSI

SCLK

tNCS -SCLK

SROM_Enable reg write SROM_Load reg write

exit burst mode

enter burst

mode

4 μs

tLOAD

byte 1 byte 1985

tBEXIT

>120ns

100 μs

address

soonest to read SROM_ID

SROM_Enable reg write

1 frame

period

−

40 μs10 μs10 μs10 μs

−

Figure 24. PROM Download Burst Mode

Frame Capture

This is a fast way to download a full array of pixel values from a single frame. This mode disables navigation and

overwrites any downloaded rmware. A hardware reset is required to restore navigation, and the rmware must be

reloaded.

To trigger the capture, write to the Frame_Capture register. The next available complete 1 2/3 frames (1536 values) will

be stored to memory. The data are retrieved by reading the Pixel_Burst register once using the normal read method,

after which the remaining bytes are clocked out by driving SCLK at the normal rate. The byte time must be at least

tLOAD. If the Pixel_Burst register is read before the data is ready, it will return all zeros.

To read a single frame, read a total of 900 bytes. The next 636 bytes will be approximately 2/3 of the next frame. The

rst pixel of the rst frame (1st read) has bit 6 set to 1 as a start-of-frame marker. The rst pixel of the second partial

frame (901st read) will also have bit 6 set to 1. All other bytes have bit 6 set to zero. The MSB of all bytes is set to 1. If

the Pixel_Burst register is read past the end of the data (1537 reads and on) , the data returned will be zeros. Pixel data

is in the lower six bits of each byte.

After the download is complete, the micro-controller must raise the NCS line for at least tBEXIT to terminate burst

mode. The read may be aborted at any time by raising NCS. Alternatively, the frame data can also be read one byte at a

time from the Frame_Capture register. See the register description for more information.

frame capture reg

NCS

address data address address

MOSI

SCLK

P0 P1 P899

MISO

tNCS -SCLK

>120ns

frame capture reg write pixel dump reg read

exit burst mode

enter burst

mode

tCAPTURE tLOAD

soonest to begin again

P0 bit 6 set to 1 all MSB = 1 see note 2

Notes:

1. MSB = 1 for all bytes. Bit 6 = 0 for all bytes except pixel 0 of both frames which has bit 6 = 1 for use as a frame marker.

2. Reading beyond pixel 899 will return the first pixel of the second partial frame.

3. tCAPTURE = 10 μs + 3 frame periods.

4. This figure illustrates reading a single complete frame of 900 pixels. An additional 636 pixels from the next frame are available.

tBEXIT

tLOAD

tSRAD

10 μs

−

4 μs

−

50 μs

−10 μs

−

Figure 25. Frame capture burst mode timing

The pixel output order as related to the surface is shown below.

Cable

RBLB

A6090

Top V iew of Mouse

Positive X

Positive Y

899 898 897 896 895 894 893 892 891 890 889 888 887 886 885 884 883 882 881 880 879 878 877 876 875 874 873 872 871 870

869 868 867 866 865 864 863 862 861 860 859 858 857 856 855 854 853 852 851 850 849 848 847 846 845 844 843 842 841 840

839 838   

etc.

  

61 60

59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30

29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Expanded view of the

surface as viewed

through the lens

last output

first output

Figure 26. Pixel address map of navigation surface image (Sensor looking at the navigation surface through the ADNS-6120/ADNS-6130-001 lens from the top

of mouse)

Error detection and recovery

1. The ADNS-6090 and the micro-controller might get

out of synchronization due to ESD events, power

supply droops or micro-controller rmware aws. In

such a case, the micro-controller should pulse NCS

high for at least 1μs. The ADNS-6090 will reset the

serial port (but not the control registers) and will be

prepared for the beginning of a new transmission

after the normal transaction delay.

2. Invalid addresses: Writing to an invalid address will

have no eect. Reading from an invalid address will

return all zeros.

3. Termination of a transmission by the micro-controller

may sometimes be required (for example, due to a

USB suspend interrupt during a read operation). To

accomplish this, the micro-controller should raise NCS.

The ADNS-6090 will not write to any register and will

reset the serial port (but not the control registers) and

be prepared for the beginning of future transmissions

after NCS goes low. The normal delays between reads

or writes (tSWW, tswr, tSRAD, tSRAD-mot) are still required

after aborted transmissions.

4. The micro-controller can verify success of write

operations by issuing a read command to the same

address and comparing written data to read data.

5. The micro-controller can verify the synchronization of

the serial port by periodically reading the product ID

and inverse product ID registers.

6. The microcontroller can read the SROM_ID register

to verify that the sensor is running downloaded

PROM code. ESD or similar noise events may cause

the sensor to revert to native ROM execution. If this

should happen, pulse RESET and reload the SROM

code.

Power Down Circuit

The following table lists the pin states during power

down.

State of Signal Pins During Power Down

Pin NPD low After wake from PD

SPI pull-ups o pre-PD state

NCS hi-Z control

functional

MISO low or hi-Z

(per NCS)

pre-PD state

or hi-Z

SCLK ignored functional

MOSI ignored functional

XY_LASER high (o) functional

RESET functional functional

NPD low (driven

externally)

functional

REFC VDD3 REFC

OSC_IN low OSC_IN

OSC_OUT high OSC_OUT

LASER_NEN high (o ) functional

The chip is put into the power down (PD) mode by lowering

the NPD input. When in PD mode, the oscillator is stopped but

all register contents are retained. To achieve the lowest current

state, all inputs must be held externally within 200mV of a rail,

either ground or VDD3. The chip outputs are driven low or hi-Z

during PD to prevent current consumption by an external load.

Notes on Power-up and the serial port

Reset Circuit

The ADNS-6090 does not perform an internal power up

self-reset; the reset pin must be raised and lowered to

reset the chip. This should be done every time power is

applied. During power-up there will be a period of time

after the power supply is high but before any clocks are

available. The table below shows the state of the various

pins during power-up and reset when the RESET pin is

driven high by a micro-controller.

State of Signal Pins After VDD is Valid

Pin Before Reset During Reset After Reset

SPI pull-

ups

undened o on (default)

NCS hi-Z control

functional

hi-Z control

functional

MISO driven or hi-Z

(per NCS)

driven or hi-Z

(per NCS)

low or hi-Z

(per NCS)

SCLK undened ignored functional

MOSI undened ignored functional

XY_LASER undened hi-Z functional

RESET functional high (exter-

nally driven)

functional

NPD undened ignored functional

LASER_

NEN

undened high (o) functional

Registers

The ADNS-6090 registers are accessible via the serial port. The registers are used to read motion data and status as

well as to set the device conguration.

Address Register Read/Write Default Value

0x00 Product_ID R 0x1C

0x01 Revision_ID R 0x20

0x02 Motion R 0x25

0x03 Delta_X R 0x00

0x04 Delta_Y R 0x00

0x05 SQUAL R 0x00

0x06 Pixel_Sum R 0x00

0x07 Maximum_Pixel R 0x00

0x08 Reserved

0x09 Resolution R/W 0x04

0x0a Conguration_bits R/W 0x5D

0x0b Extended_Cong R/W 0x08

0x0c Data_Out_Lower R Any

0x0d Data_Out_Upper R Any

0x0e Shutter_Lower R 0x85

0x0f Shutter_Upper R 0x00

0x10 Frame_Period_Lower R Any

0x11 Frame_Period_Upper R Any

0x12 Motion_Clear W Any

0x13 Frame_Capture R/W 0x00

0x14 SROM_Enable W 0x00

0x15 Reserved

0x16 Conguration II R/W 0x34

0x17-0x18 Reserved

0x19 Frame_Period_Max_Bound Lower R/W 0x90

0x1a Frame_Period_Max_Bound_Upper R/W 0x65

0x1b Frame_Period_Min_Bound_Lower R/W 0x7E

0x1c Frame_Period_Min_Bound_Upper R/W 0x0E

0x1d Shutter_Max_Bound_Lower R/W 0x20

0x1e Shutter_Max_Bound_Upper R/W 0x4E

0x1f SROM_ID R Version dependent

0x20-0x2b Reserved

0x2c LP_CFG0 R/W 0x7F

0x2d LP_CFG1 R/W 0x80

0x2e-0x3c Reserved

0x3d Observation R/W 0x80

0x3e Reserved

0x3f Inverse Product ID R 0xE3

0x40 Pixel_Burst R 0x00

0x50 Motion_Burst R 0x00

0x60 SROM_Load W Any

Product_ID Address: 0x00

Access: Read Default Value: 0x1C

Bit76543210

Field PID7PID6PID5PID4PID3PID2PID1PID0

Data Type: 8-Bit unsigned integer

Usage: This register contains a unique identication assigned to the ADNS-6090. The value in this

tional.

Revision_ID Address: 0x01

Access: Read Default Value: 0x20

Bit76543210

Field RID7RID6RID5RID4RID3RID2RID1RID0

Data Type: 8-Bit unsigned integer

Usage: This register contains the IC revision. It is subjected to change when new IC versions are

released.

Note: The downloaded SROM rmware revision is a separate value and is available in the

SROM_ID register.

Motion Address: 0x02

Access: Read Default Value: 0x20

Bit76543210

Field MOT Reserved LP_Valid OVF Reserved Reserved Fault Reserved

Data Type: Bit eld.

Usage: Register 0x02 allows the user to determine if motion has occurred since the last time it was

read. If so, then the user should read registers 0x03 and 0x04 to get the accumulated motion.

It also tells if the motion buers have overowed, if fault is detected and the current resolution

setting.

Field Name Description

MOT Motion since last report

0 = No motion

1 = Motion occurred, data ready for reading in Delta_X and Delta_Y

registers

LP_Valid This bit is an indicator of complementary value contained in registers

0x2C and 0X2D.

0 = register 0x2C and 0x2D do not have complementary values

1 = register 0x2C and 0x2D contain complementary values

OVF Motion overow, ΔY and/or ΔX buer has overowed since last report

0 = no overow

1 = overow has occurred

Fault Indicates that the RBIN and/or XY_LASER pin is shorted to GND.

0 = no fault detected

1 = fault detected

Notes for Motion:

1. Reading this register freezes the Delta_X and Delta_Y register values. Read this register

before reading the Delta_X and Delta_Y registers. If Delta_X and Delta_Y are not read before

the motion register is read a second time, the data in Delta_X and Delta_Y will be lost.

2. Avago RECOMMENDS that registers 0x02, 0x03 and 0x04 to be read sequentially.

See Motion burst mode also.

3. Internal buers can accumulate more than eight bits of motion for X or Y. If one of the

internal buers overows, then absolute path data is lost and the OVF bit is set. This bit is

cleared once some motion has been read from the Delta_X and Delta_Y registers, and if the

buers are not at full scale. Since more data is present in the buers, the cycle of reading

the Motion, Delta_X and Delta_Y registers should be repeated until the motion bit (MOT) is

cleared. Until MOT is cleared, either the Delta_X or Delta_Y registers will read either positive

or negative full scale. If the motion register has not been read for long time, at 800 cpi it

may take up to 32 read cycles to clear the buers, at 1600 cpi, up to 64 cycles and so on. Al-

ternatively, writing to the Motion_Clear register (register 0x12) will clear all stored motion at

once.

Delta_X Address: 0x03

Access: Read Default Value: 0x00

Bit76543210

Field X7X6X5X4X3X2X1X0

Data Type: Eight bit 2’s complement number.

Usage: X movement is the counts since last report. Absolute value is determined by resolution.

Reading clears the register.

Delta_Y Address: 0x04

Access: Read Default Value: 0x00

Bit76543210

Field Y7Y6Y5Y4Y3Y2Y1Y0

Data Type: Eight bit 2’s complement number.

Usage: Y movement is the counts since last report. Absolute value is determined by resolution.

Reading clears the register.

00 01 02 7E 7F

+127+126+1 +2

FFFE8180

0-1-2-127-128

Motion

Delta_X

00 01 02 7E 7F

+127+126+1 +2

FFFE8180

0-1-2-127-128

Motion

Delta_Y

SQUAL Address: 0x05

Access: Read Default Value: 0x00

Bit76543210

Field SQ7SQ6SQ5SQ4SQ3SQ2SQ1SQ0

Data Type: Upper 8 bits of a 10-bit unsigned integer.

Usage: SQUAL (Surface Quality) is a measure of ¼ of the number of valid* features visible by the sensor

in the current frame. Use the following formula to nd the total number of valid features.

Number of features = SQUAL register value x 4

The maximum SQUAL register value is 169. Since small changes in the current frame can result

in changes in SQUAL, variations in SQUAL when looking at a surface are expected. The graph

below shows 900 sequentially acquired SQUAL values, while a sensor was moved slowly over

white paper. SQUAL is nearly equal to zero if there is no surface below the sensor. SQUAL

remains fairly high throughout the Z-height range which allows illumination of most pixels in

the sensor.

Figure 27. SQUAL Values at 3000cpi (White Paper)

Figure 28. Mean SQUAL vs. Z (White Paper)

100

1 51 101 151 201 251 301 351 401 451 501 551 601 651 701 751 801 851

SQUAL Values (White Paper)

At Z=0mm, Circle@7.5" diameter, Speed-6ips

SQUAL Value (Counts)

Count

100

120

1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6

Mean SQUAL vs. Z (White Paper)

3000dpi, Circle@7.5" diameter, Speed-6ips

SQUAL (Counts)

Distance from Lens Reference Plane to Surface, Z (mm)

Avg-3sigma

Avg

Avg+3sigma

Pixel_Sum Address: 0x06

Access: Read Default Value: 0x00

Bit76543210

Field AP7AP6AP5AP4AP3AP2AP1AP0

Data Type: High 8 bits of an unsigned 16-bit integer.

Usage: This register is used to nd the average pixel value. It reports the upper byte of a 16-bit counter

which sums all 900 pixels in the current frame. It may be described as the full sum divided by

256. To nd the average pixel value, use the following formula:

Average Pixel = Register Value x 256 / 900 = Register Value / 3.51

The maximum register value is 221 (63 * 900/256 truncated to an integer). The minimum is 0.

The pixel sum value can change on every frame.

Maximum_Pixel Address: 0x07

Access: Read Default Value: 0x00

Bit76543210

Field 0 0 MP5MP4MP3MP2MP1MP0

Data Type: 6-bit number.

Usage: Maximum Pixel value in current frame. Minimum value = 0, maximum value = 63. The

maximum pixel value can vary with every frame.

Reserved Address: 0x08

Resolution Address: 0x09

Access: Read/Write Default Value: 0x04

Bit 7 6 5 4 3 2 1 0

Field 0 0 0 0 0 RES2RES1RES0

Data Type: 3-bit number

Usage: This register sets the resolution in unit of counts per inch. Resolution values are approximate.

The performance of setting is surface dependent.

Field Name Description

RES 2-0 CPI

800

1200

1600

2000

2400

3000

RES2-0

010

011

100

101

110

111

Conguration_bits Address: 0x0a

Access: Read/Write Default Value: 0x5D

Bit 7 6 5 4 3 2 1 0

Field 0 LASER_MODE Sys_Test 1 1 1 Reserved Reserved

Data Type: Bit eld

Usage: Register 0x0a allows the user to change the conguration of the sensor. Shown below are the

bits, their default values, and optional values.

Field Name Description

BIT 7 Must always be zero

LASER_MODE LASER Shutter Mode

0 = Shutter mode o (LASER always on)

1 = Shutter mode on (LASER only on when illumination is required)

Sys_Test System Tests

0 = no tests

1 = perform all system tests, output 16 bit CRC via Data_Out_Upper and

Data_Out_Lower registers.

NOTE:

The test will fail if SROM is loaded. Perform a hardware reset before

executing this test. Reload SROM after the test is completed.

The test will fail if a laser fault condition exists.

Since part of the system test is a RAM test, the RAM and SROM will be over-

written with the default values when the test is done. If any conguration

changes from the default are needed for operation, make the changes AFTER

the system test is run. The system test takes 200ms (@24MHz) to complete.

Do not access the Synchronous Serial Port during system test.

Extended_Cong Address: 0x0b

Access: Read/Write Default Value: 0x08

Bit76543210

Field Busy Reserved Reserved Reserved 1 Serial_NPU NAGC Fixed_FR

Data Type: Bit eld

Usage: Register 0x0b allows the user to change the conguration of the sensor. Shown below are the

bits, their default values, and optional values.

Field Name Description

Busy Read-only bit. Indicates if it is safe to write to one or more of the following

registers:

Frame_Period_Max_Bound_Upper and Frame_Period_Max_Bound_Lower

Frame_Period_Min_Bound_Upper and Frame_Period_Min_Bound_Lower

Shutter_Max_Bound_Upper and Shutter_Max_Bound_Lower

After writing to the Frame_Period_Maximum_Bound_Upper register, at least

two frames must pass before writing again to any of the above registers.

This bit may be used in lieu of a timer since the actual frame rate may not be

known when running in auto mode.

0 = writing to the registers is allowed

1 = do not write to the registers yet

Bit 3 Must always be one

Serial_NPU Disable serial port pull-up current sources on SCLK, MOSI and NCS

0 = no, current sources are on

1 = yes, current sources are o

NAGC Disable AGC. Shutter will be set to the value in the Shutter_Maximum_Bound

registers.

0 = no, AGC is active

1 = yes, AGC is disabled

Fixed_FR Fixed frame rate (disable automatic frame rate control). When this bit is

set, the frame rate will be determined by the value in the Frame_Period_

Maximum_Bound registers.

0 = automatic frame rate

1 = xed frame rate

Data_Out_Lower Address: 0x0c

Access: Read Default Value: Undened

Bit76543210

Field DO7DO6DO5DO4DO3DO2DO1DO0

Data_Out_Upper Address: 0x0d

Access: Read Default Value: Undened

Bit76543210

Field DO15 DO14 DO13 DO12 DO11 DO10 DO9DO8

Data Type: 16-bit word.

USAGE: Data in these registers come from the system self test or the SROM CRC test. The data can be

read out in either order.

Data_Out_Upper Data_Out_Lower

System test results: 0xA9 0xD5

SROM CRC Test Result: 0xBE 0xEF

System Test: This test is initiated via the Conguration_Bits register. It performs several tests to

verify that the hardware is functioning correctly. Perform a hardware reset just prior to running

the test. SROM contents and register settings will be lost.

SROM Content: Performs a CRC on the SROM contents. The test is initiated by writing a particular

value to the SROM_Enable register.

Shutter_Lower Address: 0x0e

Access: Read Default Value: 0x85

Bit76543210

Field S7S6S5S4S3S2S1S0

Shutter_Upper Address: 0x0f

Access: Read Default Value: 0x00

Bit76543210

Field S15 S14 S13 S12 S11 S10 S9S8

Data Type: 16-bit unsigned integer.

Usage: Units are clock cycles. Read Shutter_Upper rst, then Shutter_Lower. They should be read

consecutively. The shutter is adjusted to keep the average and maximum pixel values within

normal operating ranges. The shutter value is checked and automatically adjusted to a new

value if needed on every frame when operating in default mode. When the shutter adjusts,

it changes by ± 1/16 of the current value. The shutter value can be set manually by setting

the AGC mode to Disable using the Extended_Cong register and writing to the Shutter_Max_

Bound registers. Because the automatic frame rate feature is related to shutter value it may also

be appropriate to enable the Fixed Frame Rate mode using the Extended_Cong register.

Shown below is a graph of 900 sequentially acquired shutter values, while the sensor was

moved slowly over white paper.

The maximum value of the shutter is dependent upon the setting in the Shutter_Max_Bound_

Upper and Shutter_Max_Bound_Lower registers.

Figure 30. Mean Shutter vs. Z (White Paper)

Figure 29. Shutter Values at 3000cpi (White Paper)

Shutter Values (White Paper)

At Z=0mm, Circle@7.5" diameter, Speed-6ips

100

120

140

160

1 51 101 151 201 251 301 351 401 451 501 551 601 651 701 751 801 851

Count

Shutter value

Avg-3sigma

Avg

Avg+3sigma

Mean Shutter vs Z (White paper)

3000cpi, Circle@7.5" diameter, Speed-6ips

100

150

200

250

1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6

Distance from Lens Reference Plane to Surface, Z (mm)

Shutter value (Counts)

Frame_Period_Lower Address: 0x10

Access: Read Default Value: Undened

Bit76543210

Field FP7FP6FP5FP4FP3FP2FP1FP0

Frame_Period_Upper Address: 0x11

Access: Read Default Value: Undened

Bit76543210

Field FP15 FP14 FP13 FP12 FP11 FP10 FP9FP8

Data Type: 16-bit unsigned integer.

Usage: Read these registers to determine the current frame period and to calculate the frame rate.

Units are clock cycles. The formula is:

Frame Rate = Clock Frequency / Register value

To read from the registers, read Frame_Period_Upper rst followed by Frame_Period Lower.

To set the frame rate manually, disable automatic frame rate mode via the Extended_Cong

The following table lists some Frame_Period values for popular frame rates with a 24MHz clock.

Frames/second

Counts Frame_Period

Decimal Hex Upper Lower

7200 3,333 0D05 0D 05

5000 4,800 12C0 12 C0

3000 8,000 1F40 1F 40

2000 12,000 2EE0 2E E0

Motion_Clear Address: 0x12

Access: Write Default Value: Undened

Data Type: Any.

Usage: Writing any value to this register will cause the Delta_X, Delta_Y, and internal motion registers

to be cleared. Use this as a fast way to reset the motion counters to zero without resetting the

entire chip.

Frame_Capture Address: 0x13

Access: Read/Write Default Value: 0x00

Bit76543210

Field FC7FC6FC5FC4FC3FC2FC1FC0

Data Type: Bit eld.

Usage: Writing 0x83 to this register will cause the next available complete 1 2/3 frames of pixel values

to be stored to SROM RAM. Writing to this register is required before using the Frame Capture

burst mode to read the pixel values (see the Synchronous Serial Port section for more details).

Writing to this register will stop navigation and cause any rmware loaded in the SROM to

be overwritten. A hardware reset is required to restore navigation, and the rmware must be

reloaded using the PROM Download burst method.

This register can also be used to read the frame capture data. The same data available by

reading the Pixel_Burst register using burst mode is available by reading this register in the

normal fashion. The data pointer is automatically incremented after each read so all 1536 pixel

values (1 and 2/3 frames) may be obtained by reading this register 1536 times in a row. Both

methods share the same pointer such that reading pixel values from this register will increment

the pointer causing subsequent reads from the Pixel_Burst register (without initiating a new

frame dump) to start at the current pointer location. This register will return all zeros if read

before the frame capture data is ready. See the Frame Capture description in the Synchronous

Serial Port section for more information.

This register will not retain the last value written. Reads will return zero or frame capture data.

SROM_Enable Address: 0x14

Access: Write Default Value: 0x00

Bit76543210

Field SE7SE6SE5SE4SE3SE2SE1SE0

Data Type: 8-bit number.

Usage: Write to this register to start either PROM download or SROM CRC test.

Write 0x1D to this register, wait at least 1 frame period, and write 0x18 to this register before

downloading PROM rmware to the SROM_Load register. The download will not be successful

unless this sequence is followed. See the Synchronous Serial port section for details.

Write 0xA1 to start the SROM CRC test. Wait 7ms plus one frame period, then read result

from the Data_Out_Lower and Data_Out_Upper registers. Navigation is halted and the SPI

port should not be used during this test. Avago recommends reading the Motion register to

determine the laser fault condition before performing the SROM CRC test. Executing the test

under a fault condition will cause all subsequent register reads to return zero until the sensor is

reset or the fault is corrected.

Reserved Address: 0x15

Conguration II Address: 0x16

Access: Read/Write Default Value: 0x34

Bit 7 6 5 4 3 2 1 0

Field Reserved Reserved Reserved Reserved Reserved 1 Force_

disable

Reserved

Data Type : Bit eld

Usage : Write to this register

Field Name Description

Bit-2 Must be always one

Force_disable 0 = LASER_NEN functions as normal

1 = LASER_NEN output high. May be useful for product test.

Reserved Address: 0x17-0x18

Frame_Period_Max_Bound_Lower Address: 0x19

Access: Read/Write Default Value: 0x90

Bit76543210

Field FBM7FBM6FBM5FBM4FBM3FBM2FBM1FBM0

Frame_Period_Max_Bound_Upper Address: 0x1A

Access: Read/Write Default Value: 0x65

Bit76543210

Field FBM15 FBM14 FBM13 FBM12 FBM11 FBM10 FBM9FBM8

Data Type: 16-bit unsigned integer.

Usage: This value sets the maximum frame period (the MINIMUM frame rate) which may be selected

by the automatic frame rate control, or sets the actual frame period when operating in manual

mode. Units are clock cycles. The formula is:

Frame Rate = Clock Frequency / Register value

To read from the registers, read Upper rst followed by Lower. To write to the registers, write

Lower rst, followed by Upper. To set the frame rate manually, disable automatic frame rate

mode via the Extended_Cong register and write the desired count value to these registers.

Writing to the Frame_Period_Max_Bound_Upper and Lower registers also activates any new

values in the following registers:

x Frame_Period_Max_Bound_Upper and Lower

x Frame_Period_Min_Bound_Upper and Lower

x Shutter_Max_Bound_Upper and Lower

Any data written to these registers will be saved but will not take eect until the write to the

Frame_Period_Max_Bound_Upper and Lower is complete. After writing to this register, two

complete frame times are required to implement the new settings. Writing to any of the above

registers before the implementation is complete may put the chip into an undened state

requiring a reset. The “Busy” bit in the Extended_Cong register may be used in lieu of a timer

to determine when it is safe to write. See the Extended_Cong register for more details.

The following table lists some Frame_Period values for popular frame rates (clock rate = 24MHz).

In addition, the three bound registers must also follow this rule when set to non-default values:

Frame_Period_Max_Bound ≥ Frame_Period_Min_Bound + Shutter_Max_Bound.

Frames/

second

Counts Frame_Period

Decimal Hex Upper Lower

7200 3,333 0D05 0D 05

5000 4,800 12C0 12 C0

3000 8,000 1F40 1F 40

2000 12,000 2EE0 2E E0

Frame_Period_Min_Bound_Lower Address: 0x1B

Access: Read/Write Default Value: 0x7E

Bit76543210

Field FBm7FBm6FBm5FBm4FBm3FBm2FBm1FBm0

Frame_Period_Min_Bound_Upper Address: 0x1C

Access: Read/Write Default Value: 0x0E

Bit76543210

Field FBm15 FBm14 FBm13 FBm12 FBm11 FBm10 FBm9FBm8

Data Type: 16-bit unsigned integer.

Usage: This value sets the minimum frame period (the MAXIMUM frame rate) which may be selected

by the automatic frame rate control. Units are clock cycles. The formula is:

Frame Rate = Clock Rate / Register value

To read from the registers, read Upper rst followed by Lower. To write to the registers, write

Lower rst, followed by Upper, then execute a write to the Frame_Period_Max_Bound_Upper

and Lower registers. The minimum allowed write value is 0x0D05; the maximum is 0xFFFF.

Reading this register will return the most recent value that was written to it. However, the value

will take eect only after a write to the Frame_Period_Max_Bound_Upper and Lower registers.

After writing to Frame_Period_Max_Bound_Upper, wait at least two frame times before writing

to Frame_Period_Min_Bound_Upper or Lower again. The “Busy” bit in the Extended_Cong

Cong register for more details.

In addition, the three bound registers must also follow this rule when set to non-default values:

Frame_Period_Max_Bound ≥ Frame_Period_Min_Bound + Shutter_Max_Bound.

Shutter_Max_Bound_Lower Address: 0x1D

Access: Read/Write Default Value: 0x20

Bit76543210

Field SB7SB6SB5SB4SB3SB2SB1SB0

Shutter_Max_Bound_Upper Address: 0x1E

Access: Read/Write Default Value: 0x4E

Bit76543210

Field SB15 SB14 SB13 SB12 SB11 SB10 SB9SB8

Data Type: 16-bit unsigned integer.

Usage: This value sets the maximum allowable shutter value when operating in automatic mode. Units

are clock cycles. Since the automatic frame rate function is based on shutter value, the value

in these registers can limit the range of the frame rate control. To read from the registers, read

Upper rst followed by Lower. To write to the registers, write Lower rst, followed by Upper,

then execute a write to the Frame_Period_Max_Bound_Upper and Lower registers. To set the

shutter manually, disable the AGC via the Extended_Cong register and write the desired value

to these registers.

Reading this register will return the most recent value that was written to it. However, the value

will take eect only after a write to the Frame_Period_Max_Bound_Upper and Lower registers.

After writing to Frame_Period_Max_Bound_Upper, wait at least two frame times before writing

to Shutter_Max_Bound_Upper or Lower again. The “Busy” bit in the Extended_Cong register

may be used in lieu of a timer to determine when it is safe to write. See the Extended_Cong

In addition, the three bound registers must also follow this rule when set to non-default values:

Frame_Period_Max_Bound ≥ Frame_Period_Min_Bound + Shutter_Max_Bound.

SROM_ID Address: 0x1F

Access: Read Default Value: Version dependent

Bit76543210

Field SR7SR6SR5SR4SR3SR2SR1SR0

Data Type: 8-Bit unsigned integer.

Usage: Contains the revision of the downloaded Shadow ROM rmware. If the rmware has been suc-

cessfully downloaded and the chip is operating out of SROM, this register will contain the SROM

rmware revision; otherwise it will contain 0x00.

Note: The IC hardware revision is available by reading the Revision_ID register (register 0x01).

LP_CFG0 Address: 0x2C

Access: Read/Write Default Value: 0x7F

Bit76543210

Field 0 LP6LP5LP4LP3LP2LP1LP0

Data Type: 8-bit unsigned integer

Usage: This register is used to set the laser current. It is to be used together with register 0X2D where

programmed. Writing to this register causes a fault test to be performed on the XY_LASER pin.

The test checks for stuck low and stuck high conditions. During the test, LASER_NEN will be

driven high and XY_LASER will pulse high for 12us and pulse low for 12us (times are typical).

Both pins will return to normal operation if no fault is detected.

Field Name Description

Bit-7 Must be always 0

LP6 – LP0Controls the 7 bit DAC for adjusting laser current.

One step is equivalent to (1/192)*100% = 0.5208% drop of relative laser

current.

Refer to the table below for example of relative laser current settings.

LP6– LP3LP2LP1LP0Relative Laser Current

0000 0 0 0 100%

0000 0 0 1 99.48%

0000 0 1 0 98.96%

0000 0 1 1 98.43%

0000 1 0 0 97.92%

:::::

1111 1 0 1 34.90%

1111 1 1 0 34.38%

1111 1 1 1 33.85%

LP_CFG1 Address: 0x2D

Access: Read/Write Default Value: 0x80

Bit76543210

Field LPC7LPC6LPC5LPC4LPC3LPC2LPC1LPC0

Data Type: 8-bit unsigned integer

Usage: The value in this register must be a complement of register 0x2C for laser current to be as pro-

grammed; otherwise the laser current is set to 33.85%. Registers 0x2C and 0x2D may be written

in any order after power ON reset or SROM download.

Reserved Address: 0x2E-0x3C

Observation Address: 0x3D

Access: Read/Write Default Value: 0x80

Bit76543210

Field OB7Reserved OB5Reserved Reserved Reserved OB1OB0

OB0

Data Type: Bit eld

Usage: Each bit is set by some processes or actions at regular intervals, or when the event occurs. The

user must clear the register by writing 0x00, wait for at least a frame period delay, and read the

as part of a recovery scheme to detect a problem caused by EFT/B or ESD.

Field Name Description

OB70 = Chip is not running SROM code ,- 1 = Chip is running

SROM code

OB50 = NPD pulse was not detected,- 1 = NPD pulse was detected

OB1Set once per frame

OB0Set once per frame

Reserved Address: 0x3E

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

AV02-1362EN - June 17, 2010

Inverse_Product_ID Address: 0x3F

Access: Read Default Value: 0xE3

Bit76543210

Field NPID7NPID6NPID5NPID4NPID3NPID2NPID1NPID0

Data Type: Inverse 8-Bit unsigned integer

Usage: This value is the inverse of the Product_ID, located at the inverse address. It can be used to test

the SPI port.

Pixel_Burst Address: 0x40

Access: Read Default Value: 0x00

Bit76543210

Field PB7PB6PB5PB4PB3PB2PB1PB0

Data Type: Eight bit unsigned integer

Usage: The Pixel_Burst register is used for high-speed access to all the pixel values from one and 2/3

complete frame. See the Synchronous Serial Port section for use details.

Motion_Burst Address: 0x50

Access: Read Default Value: 0x00

Bit76543210

Field MB7MB6MB5MB4MB3MB2MB1MB0

Data Type: Various, depending on data

Usage: The Motion_Burst register is used for high-speed access to the Motion, Delta_X, Delta_Y, SQUAL,

Shutter_Upper, Shutter_Lower and Maximum_Pixel registers. See the Synchronous Serial Port

section for use details.

SROM_Load Address: 0x 60

Access: Write Default Value: N/A

Bit76543210

Field SL7SL6SL5SL4SL3SL2SL1SL0

Data Type: 8-bit unsigned integer

Usage: The SROM_Load register is used for high-speed programming of the ADNS-6090 from an

external PROM or microcontroller. See the Synchronous Serial Port section for use details.