ADNK-2080 Avago Technologies US Inc., ADNK-2080 Datasheet - Page 21
ADNK-2080
Manufacturer Part Number
ADNK-2080
Description
ADNS-2080 Sample Kit
Manufacturer
Avago Technologies US Inc.
Specifications of ADNK-2080
Main Purpose
Reference Design, Optical Mouse
Embedded
No
Utilized Ic / Part
ADNS-2080
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Primary Attributes
-
Lead Free Status / Rohs Status
Details
Other names
516-2296
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ADNK-2080
Manufacturer:
Avago Technologies US Inc.
Quantity:
135
SQUAL
Squal Quality Register
Access: Read
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
21
frame.
The maximum SQUAL register value is 180. 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 250 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 opti-
mum distance from the imaging lens (the nominal Z-height).
Figure 9. Squal values (white paper)
Figure 14. Mean squal vs. Z (White Paper)
Field SQ7
-10
60
50
40
30
20
10
60
50
40
30
20
10
0
0
Bit 7
1
-0.8
55 109 163 217 271 325 379 433 487 541 595 649 703 757 811 865
-0.6
Address: 0x05
Reset Value: 0x00
6
SQ6
-0.4
Delta from Nominal Focus (mm)
-0.2
5
SQ5
Mean SQUAL vs Z
Squal
Count
0
4
SQ4
0.2
0.4
3
SQ3
0.6
2
SQ2
0.8
Avg-3sigma
Avg
Avg+3sigma
1
1
SQ1
0
SQ0