ADNS-6010 Avago Technologies US Inc., ADNS-6010 Datasheet - Page 26

• Manufacturer Part Number: ADNS-6010
• Description: Optical Sensors - Board Mount Laser mouse sensor
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-6010

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SQUAL
Access: Read
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 find the total number of valid features.
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 700 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.
Figure 27. SQUAL Values at 2000cpi (White Paper)
Figure 28. Mean SQUAL vs. Z (White Paper)
26
120
100
80
60
40
20
Field
90
80
70
60
50
40
30
20
10
0
Bit
0
1
-0.8
Number of features = SQUAL register value *4
51
SQ
101
-0.6
7
7
Distance of Lens Reference Plane to Surface, Z (mm)
151
2000 cpi, Circle@7.5" diameter, Speed-6ips
-0.4
At Z=0mm, Circle@7.5" diameter, Speed-6ips
201
Mean SQUAL vs. Z (White Paper)
SQ
6
251
SQUAL Values (White Paper)
6
-0.2
301
Counts
351
Address: 0x05
Default Value: 0x00
0
SQ
5
5
401
0.2
451
SQ
501
4
0.4
4
551
0.6
601
SQ
3
3
651
0.8
SQ
2
Avg-3sigma
Avg
Avg+3sigma
2
SQ
1
1
SQ
0
0