21

Shutter_Upper

Address: 0x06

Access: Read

Reset Value: 0x00

Bit

7

6

5

4

3

2

1

0

Field

Shutter_Lower

Address: 0x07

Access: Read

Reset Value: 0x00

Bit

7

6

5

4

3

2

1

0

Field

Data Type:

Sixteen bit unsigned integer.

USAGE:

Units are clock cycles. They must be read in this order: Read 0x06 first, then 0x07. The shutter is con-

tinuously adjusted to keep the average and maximum pixel values within normal operating range.

The shutter value is automatically adjusted.

Figure 15. Shutter (white paper).

Figure 16. Mean shutter vs. Z (white paper).

0

10

20

30

40

50

60

70

1

47 93 139 185 231 277 323 369 415 461 507 553 599 645 691 737 783 829 875

Count

0

50

100

150

200

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

Distance from Lens Reference Plane to Tracking Surface, Z (mm)

Avg-3sigma

Avg

Avg+3sigma

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PixArt Imaging Inc.

PixArt Imaging Inc.

ADNS-5050 Optical Mouse Sensor