HLMP-ED80-XX000 AVAGO [AVAGO TECHNOLOGIES LIMITED], HLMP-ED80-XX000 Datasheet - Page 37
![no-image](/images/no-image-200.jpg)
HLMP-ED80-XX000
Manufacturer Part Number
HLMP-ED80-XX000
Description
Optical Mouse Sensor
Manufacturer
AVAGO [AVAGO TECHNOLOGIES LIMITED]
Datasheet
1.HLMP-ED80-XX000.pdf
(40 pages)
- Current page: 37 of 40
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37
Shutter_Lower
Access: Read
Shutter_Upper
Access: Read
Data Type: Sixteen bit word.
USAGE: Units are clock cycles; default value is 64. 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 can be adjusted to a new value on every frame. When the shutter adjusts, it
changes by ±1/16 of the current value. Shown below is a graph of 250 sequentially
acquired shutter values, while the sensor was moved slowly over white paper.
The focus point is important and could affect the shutter
value. The graph below shows another setup with various
z-height. This graph clearly shows that the shutter value
is dependent on focus distance.
Figure 41. Typical shutter vs. Z (white paper)
Note: This graph shows average readings over different
heights.
800
600
400
200
3.5
3.0
2.5
2.0
1.5
1.0
0.5
Field
Field
0
0
DISTANCE FROM NOMINAL FOCUS (mm)
TYPICAL SHUTTER vs. Z (WHITE PAPER)
-1.0 -0.8
0
Bit
Bit
ADNS-2051 Shutter Graph
-0.5
S
S
7
7
15
7
-0.3
25
X+ 3σ
X
X – 3σ
0
S
S
6
6
14
6
0.25
0.5
50
S
S
5
5
13
0.75
5
1.0
S
75
S
4
4
12
Address: 0x0e
Reset Value: 0x64
Address: 0x0f
Reset Value: 0x00
4
S
S
3
3
11
ADNS-2051 Shutter Value
3
SHUTTER VALUES (WHITE PAPER)
100
S
S
2
2
10
2
125
S
S
1
1
1
9
150
S
S
0
0
0
8
175
200
225
250
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