Description
The ADNS-3040 is an ultra low-power optical navigation
sensor. It has a new, low-power architecture and auto-
matic power management modes, making it ideal for
battery-and power-sensitive applications such as cordless
input devices.
The ADNS-3040 is capable of high-speed motion detec-
tion – up to 20 ips and 8g. In addition, it has an on-chip
oscillator and LED driver to minimize external compo-
nents.
The ADNS-3040 along with the ADNS-3120-001 lens,
ADNS-2220 clip and HLMP-ED80-PS000 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 required, facilitating high volume
assembly.
The sensor is programmed via registers through a four-
wire serial port. It is packaged in a 20-pin DIP.
ADNS-3040
Ultra Low-Power Optical Mouse Sensor
Data Sheet
Features
x Low power architecture
x Self-adjusting power-saving modes for longest bat-
tery life
x High speed motion detection up to 20 ips and 8g
x SmartSpeed self-adjusting frame rate for optimum
performance
x Motion detect pin output
x Internal oscillator – no clock input needed
x Selectable 400 and 800 cpi resolution
x Wide operating voltage: 2.6V-3.6V nominal
x Four wire serial port
x Minimal number of passive components
Applications
x Optical Mice
x Optical trackballs
x Integrated input devices
x Battery-powered input devices
2
Figure 1. Package outline drawing (top view)
1
3
4
2
5
6
7
8
9
10
AGND
NC
NCS
MISO
SCLK
VDD
LED GND
GND
AGND
GND
GND
XY_LED
NC
MOTION
NC
MOSI
SHTDWN
NC
20
18
17
19
16
15
14
13
12
11
TOP VIEW
PINOUT
A3040
XYYWWZ
AVDD
AGND
Pinout of ADNS-3040 Optical Mouse Sensor
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 MOTION Motion Detect (active low output)
6 XY_LED LED control
7 LED_GND Ground for LED current
8 NC No connection
9 AGND Analog Ground
10 SHTDWN Shutdown (active high input)
11 AVDD Analog Supply Voltage
12 GND Ground
13 GND Ground
14 AGND Analog Ground
15 VDD Supply Voltage
16 GND Ground
17 NC No connection
18 NC No connection
19 AGND Analog Ground
20 NC No connection
Theory of Operation
The ADNS-3040 is based on Optical Navigation Technol-
ogy, which measures changes in position by optically
acquiring sequential surface images (frames) and math-
ematically determining the direction and magnitude of
movement.
The ADNS-3040 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 mo-
tion. The DSP calculates the 'x and 'y relative displace-
ment values.
An external microcontroller reads the 'x and 'y informa-
tion from the sensor serial port. The microcontroller then
translates the data into PS2, USB, or RF signals before
sending them to the host PC or game console.
3
Figure 2. Package outline drawing
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
4
43.13
1.698
42.53
1.674
39.06
1.538
29.50
1.161
28.13
1.107
0.039
1.00
1.50
0.059 2 X I3.55
0.140
1.22
0.048
3.22
0.127
Clear Zone
Recommended
20X I0.80
0.031
0.050
1.28
11.38
0.448
0.496
12.60
0
0
0.199
5.06
7.60
0.299
0.546
13.88 0.625
15.88
Dimensions in millimeters / inches
Figure 3. Recommended PCB mechanical cutouts and spacing
Overview of Optical Mouse Sensor Assembly
Avago Technologies provides an IGES file drawing de-
scribing the base plate molding features for lens and
PCB alignment.
The components interlock as they are mounted onto
defined features on the base plate.
The ADNS-3040 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 ADNS-3120-001 lens provides optics for the imaging
of the surface as well as illumination of the surface at the
optimum angle. Features on the lens align it to the sen-
sor, base plate, and clip with the LED.
The ADNS-2220 clip holds the LED in relation to the lens.
The LED must be inserted into the clip and the LED’s
leads formed prior to loading on the PCB. The clip inter-
locks the sensor to the lens, and through the lens to the
alignment features on the base plate.
The HLMP-ED80-PS000 LED is recommended for illumi-
nation.
5
Figure 4. 2D Assembly drawing of ADNS-3040 (top and side view)
Figure 5. Exploded view
Lens 43.96
1.731 Base Plate
19.10
0.752
Top of PCB to top
of Lens gate
3.00
0.118
16.05
0.632
Clip
Plastic Spring
Base Plate
Alignment Post
Sensor
PCB
Surface
1.98
0.078
Bottom of sensor
to top of PCB
16.76
0.660
12.76
0.502 0.299
7.60
Top of PCB to top
of lens flange
Gap between sensor
lead and lens gate 3.75
0.148
0.119
0.005
Dimension in Millimeters / Inches
HLMP-ED80-PS000 (LED)
ADNS-2220 (Clip)
ADNS-3040 (Sensor)
Customer supplied PCB
ADNS-3120-001 (Lens)
Customer supplied base
plate with recommended
alignment features per
IGES drawing
6
Sensor
Clip
Lens / Light Pipe
Base Plate
Surface
LED
PCB
Figure 7. Sectional view of PCB assembly highlighting optical mouse components
ADNS-3040
Serial Port and Registers
NCS
SCLK
MOSI
MISO
Power and control
MOTION
VDD
Oscillator
LED Drive
XY_LED
GND
DSP
SHTDWN
Image Array
AVDD
AGND
Figure 6. Block diagram of ADNS-3040 optical mouse sensor
PCB Assembly Considerations
1. Insert the sensor and all other electrical components
into PCB.
2. Insert the LED into the assembly clip and bend the
leads 90 degrees.
3. Insert the LED/clip assembly into PCB.
4. Wave Solder the entire assembly in a no-wash solder
process utilizing solder fixture. The solder fixture is
needed to protect the sensor during the solder pro-
cess. It also sets the correct sensor-to-PCB distance as
the lead shoulders do not normally rest on the PCB
surface. The fixture should be designed to expose
the sensor leads to solder while shielding the optical
aperture from direct solder contact.
5. Place the lens onto the base plate.
6. Remove the protective kapton tape from optical
aperture of the sensor. Care must be taken to keep
Note
that the lens material is polycarbonate and therefore, cyanoacrylate based adhesives or other adhesives that may damage the lens should NOT be
used.
Typical Distance Millimeters
Creepage 16.0
Clearance 2.1
contaminants from entering the aperture. Recom-
mend not to place the PCB facing up during the entire
mouse assembly process. Recommend to hold the
PCB first vertically for the kapton removal process.
7. Insert PCB assembly over the lens onto the base plate
aligning post to retain PCB assembly. The sensor ap-
erture ring should self-align to the lens.
8. 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.
9. Install mouse top case. There MUST be a feature in the
top case to press down onto the clip to ensure all
components are interlocked to the correct vertical
height.
Design considerations for improved 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 Technologies supplied IGES file and
ADNS-3120-001 lens.
7
21
3
LB
MAX1722
BATT
GND
FB
LX
OUT
R7
1.1M
4
51
2
3
R6
1M
C9
100uF
C10
100nF
R8
10
VDDA
L1
22uH
C11
100uF
BAT+1
BAT-1 R9
10
R10
10
R11
10
R12
10
MVDD
VDD
LVDD
AVDD
U3
ADNS-3040
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
13
12
11
NCS
MISO
MOTION
XY_LED
MOSI
SCLK
SHTDWN
LED_GND
NC
AGND
NC
AGDN
NC
NC
GND
VDD
AGND
GND
GND
AVDD
C3
1uF
C4
10nF
AVDD
14
C1
1uF
C2
10nF
VDD
D1
HLMP-ED80
C5
1uF
C6
10nF
LVDD
VDD
Z2
Z1
8
21
3
MB
21
3
RB
3
2
G1
G2
5
4
Z-Wheel
R1
0
R4
Open
MVDD
9
12
2
3
16
15
7
6
11
14
13
10
4
MVDD
C7
10uF
C8
100nF
5
R5
1M
1
R2
100K
R3
100K
RF_OFF
RF_DATA
U1
VDDA
U2
MC68HC908QY4
VSS
PTB0
PTB1
PTA3
PTA4
PTA5
PTA1
PTB2
PTB3
PTB4
PTB7
PTB6
PTA2
PTB5
VDD
PTA0
GND
D+
D-
VDD
L2
R17
27
R18
27
L3
C11
47pF
R19
Open
C12
47pF
R21
Open
R20
1K5
VREG
PTE3
PTE4
USB BUS
VDD
R22
10K
C15
47uF
C16
100nF
R23
10K
Q1
MMBT3906
RF_OFF
R25
10M X1
12MHz
C17
30pF
C18
30pF
OSC1
OSC2
R24
10
C13
47uF
C14
100nF
C13
47uF
C14
100nF
VSS RF_DATA
U4
MC68HC908JB12
4
8
9
5
15
PTA4
1PTE1
2
3
7
IRQ
PTC0
Q2
MMBT3904
R26
1M
C19
47nF
R27
1M
11
10
VDDA
C19
10nF
20
RST
RF
Transmitter
Circuitry
RF
Receiver
Circuitry
ID
Button
VDDA
Notes The supply and ground paths should be laid out using a star topology.
Figure 8. Schematic Diagram for Interface between ADNS-3040 and microcontroller
8
Regulatory Requirements
x Passes FCC B and worldwide analogous emission
limits when assembled into a mouse with shielded
cable and following Avago Technologies recommen-
dations.
x Passes IEC-1000-4-3 radiated susceptibility level when
assembled into a mouse with shielded cable and fol-
lowing Avago Technologies recommendations.
x Passes EN61000-4-4/IEC801-4 EFT tests when assem-
bled into a mouse with shielded cable and following
Avago Technologies recommendations.
x UL flammability level UL94 V-0.
x Provides sufficient ESD creepage/clearance distance
to avoid discharge up to 15kV when assembled into a
mouse according to usage instructions above.
Object Surface
2.55
0.094
Sensor
Lens
Figure 9. Distance from lens reference plane to surface
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Notes
Storage Temperature TS-40 85 qC
Lead Solder Temp 260 °C For 10 seconds, 1.6mm below seating
plane.
Supply Voltage VDD -0.5 3.7 V
ESD 2 kV All pins, human body model MIL 883
Method 3015
Input Voltage VIN -0.5 VDD+0.5 V All Pins
Latchup Current IOUT 20 mA All Pins
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Units Notes
Operating Temperature TA0 40 °C
Power supply voltage
- for HLMP-ED80-PS000 LED *
VDD 2.6 3.6 Volts Including noise.
Power supply rise time VRT 0.001 100 ms 0 to 2.6V
Supply noise(Sinusoidal) VNA 100 mV p-p 10kHz-50MHz
Serial Port Clock Frequency fSCLK 1 MHz Active drive, 50% duty cycle.
Distance from lens reference
plane to surface
Z 2.45 2.55 2.65 mm Results in 0.2 mm DOF, See drawing
below
Speed S 20 in/sec
Acceleration A 8 g
Load Capacitance COUT 100 pF MOTION, MISO
9
AC Electrical Specifications
Electrical Characteristics over recommended operating conditions. Typical values at 25 °C, VDD3=2.6V.
Parameter Symbol Min. Typ. Max. Units Notes
Motion delay after reset tMOTRST 23 ms From SW_RESET register write to valid motion,
assuming motion is present
Shutdown tSTDWN 50 ms From STDWN pin active to low current
Wake from shutdown tWAKEUP 1 s From STDWN pin inactive to valid motion.
Notes: A RESET must be asserted after a shut-
down. Refer to section “Notes on Shutdown
and Forced Rest”, also note tMOT-RST
Forced Rest enable tRESTEN 1 s From RESTEN bits set to low current
Wake from Forced Rest tRESTDIS 1 s From RESTEN bits cleared to valid motion
MISO rise time trMISO 150 300 ns CL = 100pF
MISO fall time tf-MISO 150 300 ns CL = 100pF
MISO delay after SCLK tDLYMISO 120 ns From SCLK falling edge to MISO data valid, no
load conditions
MISO hold time tHOLD
MISO
0.5 1/fSCLK μs 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 30 Ps From rising SCLK for last bit of the first data
byte, to rising SCLK for last bit of the second
data byte.
SPI time between write
and read commands
tSWR 20 Ps From rising SCLK for last bit of the first data
byte, to rising SCLK for last bit of the second
address byte.
SPI time between read
and subsequent com-
mands
tSRWtSRR 500 ns From rising SCLK for last bit of the first data
byte, to falling SCLK for the first bit of the ad-
dress byte of the next command.
SPI read address-data
delay
tSRAD 4Ps From rising SCLK for last bit of the address
byte, to falling SCLK for first bit of data being
read.
NCS inactive after motion
burst
tBEXIT 500 ns Minimum NCS inactive time after motion
burst before next SPI usage
NCS to SCLK active tNCS-SCLK 120 ns From NCS falling edge to first SCLK rising
edge
SCLK to NCS inactive
(for read operation)
tSCLK-NCS 120 ns From last SCLK rising edge to NCS rising edge,
for valid MISO data transfer
SCLK to NCS inactive
(for write operation)
tSCLK-NCS 20 us From last SCLK rising edge to NCS rising edge,
for valid MOSI data transfer
NCS to MISO high-Z tNCSMISO 500 ns From NCS rising edge to MISO high-Z state
MOTION rise time tr-MOTION 150 300 ns CL = 100pF
MOTION fall time tFMOTION 150 300 ns CL = 100pF
SHTDWN pulse width tPSTDWN 1s
Transient Supply Current IDDT 45 mA Max supply current during a VDD ramp from
0 to 2.6V
10
DC Electrical Specifications
Electrical Characteristics over recommended operating conditions. Typical values at 25 °C, VDD=2.6 V.
Parameter Symbol Min. Typ. Max. Units Notes
DC Supply Current
in various modes
IDD_RUN
IDD_REST1
IDD_REST2
IDD_REST3
2.9
0.5
0.1
0.03
10
1.8
0.4
0.15
mA Average current, including LED current. No
load on MISO, MOTION.
Peak Supply Current 40 mA Peak current in 100kHz bandwidth, includ-
ing LED current.
Shutdown Supply
Current
IDDSTDWN 112PA SCLK, MOSI and NCS must be within
300mV of GND or VDD. STDWN must be
within 300mV of VDD.
Input Low Voltage VIL 0.6 V SCLK, MOSI, NCS, STDWN
Input High Voltage VIH VDD - 0.6 V SCLK, MOSI, NCS, STDWN
Input hysteresis VI_HYS 100 mV SCLK, MOSI, NCS, STDWN
Input leakage current Ileak ±1 ±10 PA Vin=VDD-0.6V, SCLK, MOSI, NCS, STDWN
XY_LED Current ILED 13 25 mA XY_LED pin voltage should be greater than
0.15V and less than 1.4V. XY_LED current is
pulsed, so average value is much lower
Output Low Voltage VOL 0.7 V IOUT=1mA, MISO, MOTION
Output High Voltage VOH VDD-0.7 V IOUT=-1mA, MISO, MOTION
Input Capacitance Cin 10 pF MOSI, NCS, SCLK, STDWN
11
Typical Performance Characteristics
Typical Resolution vs Z-height
0
100
200
300
400
500
600
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
Z-height (mm, 2.55=nominal focus)
Resolution (cpi)
White paper
Manila
Black formica
White Melamine bookshelf
Z
recommended
range
Typical Path Deviation
Largest Single Perpendicular Deviation From A Straight Line At 45 Degrees
Path Length = 4 inches; Speed = 6 ips ; Resolution = 500 cpi
0
10
20
30
40
50
60
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 3.3 3.4
Distance From Lens Reference Plane To Navigation Surface (2.55mm)
Maximum distance (mouse count)
Black Formica
White Melamine bookshelf
Manila
White paper
Relative Responsivity for ADNS-3040
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
400 500 600 700 800 900 1000
Wavelength (nm)
Relative Responsivity
Figure 12. Relative Responsivity
Figure 11. Average error vs. distance (mm)
Figure 10. Mean Resolution vs. Z (White Paper).
12
Power management modes
The ADNS-3040 has three power-saving modes. Each
mode has a different motion detection period, affecting
response time to mouse motion (Response Time). The
sensor automatically changes to the appropriate mode,
depending on the time since the last reported motion
(Downshift Time). The parameters of each mode are
shown in the following table.
Motion Pin Timing
The motion pin is a level-sensitive output that signals the
micro-controller when motion has occurred. The motion
pin is lowered whenever the motion bit is set; in other
words, whenever there is data in the Delta_X or Delta_Y
registers. Clearing the motion bit (by reading Delta_Y
and Delta_X, or writing to the Motion register) will put
the motion pin high.
LED Mode
For power savings, the LED will not be continuously on.
ADNS-3040 will flash the LED only when needed.
Synchronous Serial Port
The synchronous serial port is used to set and read pa-
rameters in the ADNS-3040, and to read out the motion
information.
The port is a four wire serial port. The host micro-con-
troller always initiates communication; the ADNS-3040
never initiates data transfers. SCLK, MOSI, and NCS may
be driven directly by a micro-controller. 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.
Mode
Response Time
(nominal)
Downshift Time
(nominal)
Rest 1 16.5 ms 237 ms
Rest 2 82 ms 8.4 s
Rest 3 410 ms 504 s
The lines that comprise the SPI port:
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. After a transaction is aborted, the nor-
mal address-to-data or transaction-to-transaction delay
is still required before beginning the next transaction.
To improve communication reliability, all serial transac-
tions 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 terminated.
13
A6A5A2
A3
A4A0
A1D7D4
D5
D6D0
D1
D2
D3
15789
10 11 12 13 14 16
23456
1
SCLK
MOSI
MOSI Driven by Micro Controller
1
1
1
A6
2
NCS
MISO
Figure 13. Write Operation
Figure 14. MOSI Setup and Hold Time
1 2 3 4 5 6 7 8
SCLK
Cycle #
SCLK
MOSI 0 A6A5A4A3A2A1A0
910 11 12 13 14 15 16
MISO D6D5D4D3D2D1D0
D7
NCS
tSRAD delay
Figure 15. Read Operation
Figure 16. MISO Delay and Hold Time
SCLK
MOSI
tsetup,MOSI
tHold,MOSI
SCLK
MISO D0
tHOLD MISO
tDLY - MISO
Write Operation
Write operation, defined as data going from the micro-
controller to the ADNS-3040, is always initiated by the
micro-controller and consists of two bytes. The first 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-3040 reads MOSI on rising edges
of SCLK.
Read Operation
A read operation, defined as data going from the ADNS-
3040 to the micro-controller, is always initiated by the
micro-controller and consists of two bytes. The first 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-3040 over MISO. The sensor outputs MISO bits on
falling edges of SCLK and samples MOSI bits on every
rising edge of SCLK.
NOTE:
The 0.5/fSCLK minimum high state of SCLK is also the minimum MISO data
hold time of the ADNS-3040. Since the falling edge of SCLK is actually
the start of the next read or write command, the ADNS-3040 will hold
the state of data on MISO until the falling edge of SCLK.
14
SCLK
Address Data
tSWW
Write Operation
Address Data
Write Operation
Figure 17. Timing between two write commands
Address Data
Write Operation
Address
Next Read
Operation
SCLK
tSWR
Figure 18. Timing between write and read commands
Next Read or
Write Operation
Data
tSRAD
Read Operation
Address
tSRW & tSRR
Address
SCLK
Figure 19. Timing between read and either write or subsequent read commands
Required timing between Read and Write Commands
There are minimum timing requirements between read
and write commands on the serial port.
If the rising edge of the SCLK for the last data bit of the
second write command occurs before the required delay
(tSWW), then the first write command may not complete
correctly.
If the rising edge of SCLK for the last address bit of the
read command occurs before the required delay (tSWR),
the write command may not complete correctly.
During a read operation SCLK should be delayed at least
tSRAD after the last address data bit to ensure that the
ADNS-3040 has time to prepare the requested data. The
falling edge of SCLK for the first address bit of either the
read or write command must be at least tSRR or tSRW after
the last SCLK rising edge of the last data bit of the previ-
ous read operation.
Burst Mode Operation
Burst mode is a special serial port operation mode that
may be used to reduce the serial transaction time for a
motion read. The speed improvement is achieved by
continuous data clocking from multiple registers with-
out the need to specify the register address, and by not
requiring the normal delay period between data bytes.
Burst mode is activated by reading the Motion_Burst
register. The ADNS-3040 will respond with the contents
of the Motion, Delta_Y, Delta_X, SQUAL, Shutter_Upper,
Shutter_Lower and Maximum_Pixel registers in that
order. The burst transaction can be terminated after the
first 3 bytes of the sequence are read by bringing the
NCS pin high. After sending the register address, the
micro-controller must wait tSRAD and then begin reading
data. All data bits can be read with no delay between
bytes by driving SCLK at the normal rate. The data is
latched into the output buffer after the last address bit
is received. After the burst transmission 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.
15
Notes on Shutdown and Forced Rest
The ADNS-3040 can be set to Rest mode through the
Configuration_Bits register (0x11). This is to allow for
further power savings in applications where the sensor
does not need to operate all the time.
The ADNS-3040 can be set to Shutdown mode by assert-
ing the SHTDWN pin. For proper operation, SHTDWN
pulse width must be at least tSTDWN. Shorter pulse
widths may cause the chip to enter an undefined state.
In addition, the SPI port should not be accessed when
SHTDWN is asserted. (Other ICs on the same SPI bus can
be accessed, as long as the sensor’s NCS pin is not as-
serted.) The table below shows the state of various pins
during shutdown. After deasserting SHTDWN, a full reset
must be initiated. Wait tWAKEUP before accessing the SPI
port, then write 0x5A to the POWER_UP_RESET register.
Any register settings must then be reloaded.
* NCS pin must be held to 1 (high) if SPI bus is
shared with other devices. It can be in either
state if the sensor is the only device in addi-
tion
to the microcontroller.
Note:
There are long wakeup times from shutdown
and forced Rest. These features should not
be
used for power management during normal
mouse motion.
Notes on Power-up
The ADNS-3040 does not perform an internal power up
self-reset; the POWER_UP_RESET register must be written
every time power is applied. The appropriate sequence
is as follows:
1. Apply power
2. Drive NCS high, then low to reset the SPI port
3. Write 0x5a to register 0x3a
4. Read from registers 0x02, 0x03 and 0x04 (or read
these same 3 bytes from burst motion
register 0x42) one time regardless the state of the
motion pin.
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 dur-
ing power-up and reset.
State of Signal Pins After VDD is Valid
Pin
On
Power-Up
NCS high
before
reset
NCS Low
before
reset
After
Reset
NCS functional high low functional
MISO undefined undefined functional depends
on NCS
SCLK ignored ignored functional depends
on NCS
MOSI ignored ignored functional depends
on NCS
XY_LED undefined undefined undefined functional
MOTION undefined undefined undefined functional
SHT-
DWN
must be
low
must
below
must be
low
functional
Pin SHTDWN active
NCS Functional*
MISO Undefined
SCLK Undefined
MOSI Undefined
XY_LED Low current
MOTION Undefined
Motion_Burst Register Address Read First Byte
First Read Operation Read Second Byte
SCLK
tSRAD
Read Third Byte
Figure 20. Motion Burst Timing
16
Registers
The ADNS-3040 registers are accessible via the serial port. The registers are used to read motion data and status as
well as to set the device configuration.
Address Register Read/Write Default Value
0x00 Product_ID R 0x0D
0x01 Revision_ID R 0x02
0x02 Motion R/W 0x00
0x03 Delta_Y R Any
0x04 Delta_X R Any
0x05 SQUAL R Any
0x06 Shutter_Upper R Any
0x07 Shutter_Lower R Any
0x08 Maximum_Pixel R Any
0x09 Pixel_Sum R Any
0x0a Minimum_Pixel R Any
0x0b Pixel_Grab R/W Any
0x0c CRC0 R Any
0x0d CRC1 R Any
0x0e CRC2 R Any
0x0f CRC3 R Any
0x10 Self_Test W
0x11 Configuration_Bits R/W 0x03
0x12-0x2d Reserved
0x2e Observation R/W Any
0x2f-0x38 Reserved
0x3a POWER_UP_RESET W
0x3b-0x3d Reserved
0x3e Inverse_Revision_ID R 0xFD
0x3f Inverse_Product_ID R 0xF2
0x42 Motion_Burst R Any
17
Product ID Address: 0x00
Access: Read Reset Value: 0x0D
Bit76543210
Field PID7PID6PID5PID4PID3PID2PID1PID0
Data Type: 8-Bit unsigned integer
USAGE: This register contains a unique identification assigned to the ADNS-3040. The value in this register does not
change; it can be used to verify that the serial communications link is functional.
Revision ID Address: 0x01
Access: Read Reset Value: 0x02
Bit76543210
Field RID7RID6RID5RID4RID3RID2RID1RID0
Data Type: 8-Bit unsigned integer
USAGE: This register contains the IC revision. It is subject to change when new IC versions are released.
18
Motion Address: 0x02
Access: Read/Write Reset Value: 0x00
Bit76543210
Field MOT PIXRDY PIXFIRST OVF Reserved Reserved Reserved Reserved
Data Type: Bit field.
USAGE: Register 0x02 allows the user to determine if motion has occurred since the last time it was read. If the MOT
bit is set, then the user should read registers 0x03 and 0x04 to get the accumulated motion. Read this register before
reading the Delta_Y and Delta_X registers.
Writing anything to this register clears the MOT and OVF bits, Delta_Y and Delta_X registers. The written data byte
is not saved.
Internal buffers can accumulate more than eight bits of motion for X or Y. If either one of the internal buffers overflows,
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 buffers are not at full scale. Since more data is present in the buffers, 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 400 cpi it may take up to 16 read cycles to clear the buffers, at 800 cpi, up
to 32 cycles. To clear an overflow, write anything to this register.
The PIXRDY bit will be set whenever a valid pixel data byte is available in the Pixel_Dump register. Check that this bit
is set before reading from Pixel_Dump. To ensure that the Pixel_Grab pointer has been reset to pixel 0,0 on the initial
write to Pixel_Grab, check to see if PIXFIRST is set to high.
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
PIXRDY Pixel Dump data byte is available in Pixel_Dump register
0 = data not available
1 = data available
PIXFIRST This bit is set when the Pixel_Grab register is written to or when the complete pixel array has
been read, initiating an increment to pixel 0,0.
0 = Pixel_Grab data not from pixel 0,0
1 = Pixel_Grab data is from pixel 0,0
OVF Motion overflow, 'Y and/or 'X buffer has overflowed since last report
0 = no overflow
1 = Overflow has occurred
19
Delta Y Address: 0x03
access: Read Reset Value: Undefined
Bit76543210
Field X7X6X5X4X3X2X1X0
Data Type: Eight bit 2’s complement number.
USAGE: Y movement is counts since last report. Absolute value is determined by resolution. Reading clears the reg-
ister.
00 01 02 7E 7F
+127+126+1 +2
FFFE8180
0-1-2-127-128
Motion
Delta_Y
NOTES: Avago Technologies RECOMMENDS that registers 0x03 and 0x04 be read sequentially.
Delta X Address: 0x04
Access: Read Reset Values: Undefined
Bit76543210
Field Y7Y6Y5Y4Y3Y2Y1Y0
Data Type: Eight bit 2’s complement number.
USAGE: X movement is counts since last report. Absolute value is determined by resolution. Reading clears the reg-
ister.
00 01 02 7E 7F
+127+126+1 +2
FFFE8180
0-1-2-127-128
Motion
Delta_X
NOTES: Avago Technologies RECOMMENDS that registers 0x03 and 0x04 be read sequentially.
20
SQUAL Address: 0x05
Access: Read Reset Value: Undefined
Bit76543210
Field SQ7SQ6SQ5SQ4SQ3SQ2SQ1SQ0
Data Type: Upper 8 bits of a 9-bit unsigned integer.
USAGE: SQUAL (Surface Quality) is a measure of the number of valid features visible by the sensor in the current
frame.
The maximum SQUAL register value is 167. 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 500 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 is typically maximized when the navigation surface is at the optimum distance from the imaging
lens (the nominal Z-height).
Figure 21. SQUAL values (white paper)
Mean SQUAL vs Z (white paper)
0
10
20
30
40
50
60
1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2
Delta from Nominal Focus (2.55mm)
Squal Value (count)
Avg+3sigma
Avg
Avg-3sigma
Figure 22. Mean SQUAL vs. Z (white paper)
SQUAL Value (white Paper)
0
10
20
30
40
50
60
70
80
90
100
1
25
49
73
97
121
145
169
193
217
241
265
289
313
337
361
385
409
433
457
481
Count
Squal value
21
Shutter_Upper Address: 0x06
Access: Read Reset Value: Undefined
Bit76543210
Field S15 S14 S13 S12 S11 S10 S9S8
Shutter_Lower Address: 0x07
Access: Read Reset Value: Undefined
Bit76543210
Field S7S6S5S4S3S2S1S0
Data Type: Sixteen bit unsigned integer.
USAGE: Units are clock cycles. Read Shutter_Upper first, 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 automatically adjusted.
Shutter
20
30
40
50
60
70
80
90
100
110
120
1
25
49
73
97
121
145
169
193
217
241
265
289
313
337
361
385
409
433
457
481
Count
Shutter value
figure 23. Shutter values (white paper)
Mean Shutter vs Z (white Paper)
0
50
100
150
200
1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2
Delta from Nominal Focus (2.55mm)
Shutter value (Count)
Figure 24. Mea n Shutter vs. Z (white paper)
22
Maximum Pixel address: 0x08
Access: Read Reset Value: Underfined
Bit76543210
Field MP7MP6MP5MP4MP3MP2MP1MP0
Data Type: Eight-bit number.
USAGE: Maximum Pixel value in current frame. Minimum value = 0, maximum value = 254. The maximum pixel value
can vary with every frame.
Pixel_Sum Address: 0x09
Access: Read Reset Value: Undefined
Bit76543210
Field AP7AP6AP5AP4AP3AP2AP1AP0
Data Type: High 8 bits of an unsigned 17-bit integer.
USAGE: This register is used to find the average pixel value. It reports the seven bits of a 16-bit counter, which sums
all pixels in the current frame. It may be described as the full sum divided by 512. To find the average pixel value, use
the following formula:
Average Pixel = Register Value * 128/121 = Register Value * 1.06
The maximum register value is 240. The minimum is 0. The pixel sum value can change on every frame.
Minimum_Pixel Address: 0x0a
Access: Read Reset Value: Undefined
Bit76543210
Field MP7MP6MP5MP4MP3MP2MP1MP0
Data Type: Eight-bit number.
USAGE: Minimum Pixel value in current frame. Minimum value = 0, maximum value = 254. The minimum pixel value
can vary with every frame.
23
CRC0 Address: 0x0c
Access: Read Reset Value: Undefined
Bit76543210
Field CRC07CRC06CRC05CRC04CRC03CRC02CRC01CRC00
Data Type: Eight-bit number
USAGE: Register 0x0c reports the first byte of the system self test results. Value = 0xAF. See Self Test register 0x10.
Pixel_Grab Address: 0x0b
Access: Read/Write Reset Value: Undefined
Bit76543210
Field PD7PD6PD5PD4PD3PD2PD1PD0
Data Type: Eight-bit word.
USAGE: For test purposes, the sensor will read out the contents of the pixel array, one pixel per frame. To start a pixel
grab, write anything to this register to reset the pointer to pixel 0,0. Then read the PIXRDY bit in the Motion register.
When the PIXRDY bit is set, there is valid data in this register to read out. After the data in this register is read, the
pointer will automatically increment to the next pixel. Reading may continue indefinitely; once a complete frame’s
worth of pixels has been read, PIXFIRST will be set to high to indicate the start of the first pixel and the address pointer
will start at the beginning location again.
Pixel Address Map (Looking through the ADNS-3120-001 Lens)
First Pixel
0 22 44 66 88 110 132 154 176 198 220 242 264 286 308 330 352 374 396 418 440 462
1 23 45 67 89 111 133 155 177 199 221 243 265 287 309 331 353 375 397 419 441 463
2 24 46 68 90 112 134 156 178 200 222 244 266 288 310 332 354 376 398 420 442 464
3 25 47 69 91 113 135 157 179 201 223 245 267 289 311 333 355 377 399 421 443 465
4 26 48 70 92 114 136 158 180 202 224 246 268 290 312 334 356 378 400 422 444 466
5 27 49 71 93 115 137 159 181 203 225 247 269 291 313 335 357 379 401 423 445 467
6 28 50 72 94 116 138 160 182 204 226 248 270 292 314 336 358 380 402 424 446 468
7 29 51 73 95 117 139 161 183 205 227 249 271 293 315 337 359 381 403 425 447 469
8 30 52 74 96 118 140 162 184 206 228 250 272 294 316 338 360 382 404 426 448 470
9 31 53 75 97 119 141 163 185 207 229 251 273 295 317 339 361 383 405 427 449 471
10 32 54 76 98 120 142 164 186 208 230 252 274 296 318 340 362 384 406 428 450 472
11 33 55 77 99 121 143 165 187 209 231 253 275 297 319 341 363 385 407 429 451 473
12 34 56 78 100 122 144 166 188 210 232 254 276 298 320 342 364 386 408 430 452 474
13 35 57 79 101 123 145 167 189 211 233 255 277 299 321 343 365 387 409 431 453 475
14 36 58 80 102 124 146 168 190 212 234 256 278 300 322 344 366 388 410 432 454 476
15 37 59 81 103 125 147 169 191 213 235 257 279 301 323 345 367 389 411 433 455 477
16 38 60 82 104 126 148 170 192 214 236 258 280 302 324 346 368 390 412 434 456 478
17 39 61 83 105 127 149 171 193 215 237 259 281 303 325 347 369 391 413 435 457 479
18 40 62 84 106 128 150 172 194 216 238 260 282 304 326 348 370 392 414 436 458 480
19 41 63 85 107 129 151 173 195 217 239 261 283 305 327 349 371 393 415 437 459 481
20 42 64 86 108 130 152 174 196 218 240 262 284 306 328 350 372 394 416 438 460 482
21 43 65 87 109 131 153 175 197 219 241 263 285 307 329 351 373 395 417 439 461 483
Last Pixel
RBLB
Top Xray View of Mouse
POSITIVE X
20
1
11
A3040
YYWW
10
P
O
S
I
T
I
V
E
Y
24
CRC3 Address: 0x0f
Access: Read Reset Value: Undefined
Bit76543210
Field CRC37CRC36CRC35CRC34CRC33CRC32CRC31CRC30
Data Type: Eight-bit number
USAGE: Register 0x0f reports the fourth byte of the system self test results. Value = 0x22. See Self Test register 0x10.
CRC2 Address: 0x0e
Access: Read Reset Value: Undefined
Bit76543210
Field CRC27CRC26CRC25CRC24CRC23CRC22CRC21CRC20
Data Type: Eight-bit number
USAGE: Register 0x0e reports the third byte of the system self test results. Value = 0x31. See Self Test register 0x10.
CRC1 Address: 0x0d
Access: Read Reset Value: Undefined
Bit76543210
Field CRC17CRC16CRC15CRC14CRC13CRC12CRC11CRC10
Data Type: Eight bit number
USAGE: Register 0x0c reports the second byte of the system self test results. Value = 0x4E. See Self Test register 0x10.
25
Reserved Address: 0x12-0x2d
Configuration_bits Address: 0x11
Access: Read/Write Reset Value: 0x03
Bit76543210
Field RES Reserved RESTEN1 RESTEN0 Reserved Reserved Reserved Reserved
Data Type: Bit field
USAGE: Register 0x11 allows the user to change the configuration of the sensor. Setting the RESTEN bit forces the
sensor into Rest mode, as described in the power modes section above. The RES bit allows selection between 400
and 800 cpi resolution.
Note: Forced Rest has a long wakeup time and should not be used for power management during normal mouse
motion.
Self_Test Address: 0x10
Access: Write Reset Value: NA
Bit76543210
FIELD Reserved Reserved Reserved Reserved Reserved Reserved Reserved TESTEN
Data Type: Bit field
USAGE: Set the TESTEN bit in register 0x10 to start the system self-test. The test takes 250ms. During this time, do
not write or read through the SPI port. Results are available in the CRC0-3 registers. After self-test, reset the chip to
start normal operation.
Field Name Description
TESTEN Enable System Self Test
0 = Disable
1 = Enable
Field Name Description
RESTEN1-0 Puts chip into Rest mode
00 = normal operation
01 = force Rest1
10 = force Rest2
11 = force Rest3
RES Sets resolution
0 = 400
1 = 800
26
Observation Address: 0x2e
Access: Read/Write Reset Value: Undefined
Bit76543210
Field MODE1MODE0Reserved Reserved OBS3OBS2OBS1OBS0
Data Type: Bit field
USAGE: Register 0x2e provides bits that are set every frame. It can be used during EFTB testing to check that the chip
is running correctly. Writing anything to this register will clear the bits.
Reserved Address: 0x2f-0x39
POWER_UP_RESET Address: 0x3a
Access: Write Reset Value: Undefined
Bit76543210
FIELD RST7RST6RST5RST4RST3RST2RST1RST0
Data Type: 8-bit integer
USAGE: Write 0x5A to this register to reset the chip. All settings will revert to default values.
Field Name Description
MODE10 Mode Status: Reports which mode the sensor is in.
00 = Run
01 = Rest1
10 = Rest2
11 = Rest3
OBS30 Set every frame
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.
Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved. Obsoletes AV01-0073EN
AV02-0150EN - December 3, 2009
Motion_Burst Address: 0x42
Access: Read Reset Value: Any
Bit76543210
Field MB7MB6MB5MB4MB3MB2MB1MB0
Data Type: Various.
USAGE: Read from this register to activate burst mode. The sensor will return the data in the Motion register, Delta_Y,
Delta_X, Squal, Shutter_Upper, Shutter_Lower, and Maximum_Pixel. A minimum of 3 bytes should be read during a
burst read. Reading the first 3 bytes clears the motion data.
Inverse_Product_ID Address: 0x3f
Access: Read Reset Value: 0xF2
Bit76543210
Field NPID7NPID6NPID5NPID4NPID3NPID2NPID1NPID0
Data Type: Inverse 8-Bit unsigned integer
USAGE: This value is the inverse of the Product_ID. It can be used to test the SPI port.
Inverse_Revision_ID Address: 0x3e
Access: Read Reset Value: 0xFD
Bit76543210
Field NRID7NRID6NRID5NRID4NRID3NRID2NRID1NRID0
Data Type: Inverse 8-Bit unsigned integer
USAGE: This value is the inverse of the Revision_ID. It can be used to test the SPI port.