ADNS-6000 Avago Technologies US Inc., ADNS-6000 Datasheet - Page 31

• Manufacturer Part Number: ADNS-6000
• Description: Laser Mouse Sensor
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-6000

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

Shutter_Lower
Access: Read
Shutter_Upper
Access: Read
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 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_Config 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_Config register.
Shown below is a graph of 700 sequentially acquired shutter values, while the sensor was moved slowly over white
paper.
Figure 29. Shutter Values at 800cpi (White Paper)
31
Field
Field
160
140
120
100
Bit
Bit
80
60
40
20
0
1
51
S
S
101
7
7
15
7
151
At Z=0mm, Circle@7.5" diameter, Speed-6ips
201
S
S
6
6
14
6
251
Shutter Value (White Paper)
301
Address: 0x0e
Default Value: 0x85
Address: 0x0f
Default Value: 0x00
S
Counts
S
5
5
13
351
5
401
451
S
S
4
12
4
4
501
551
S
3
11
S
3
601
3
651
S
S
2
10
2
2
S
S
1
1
9
1
S
S
0
0
0
8