23

Shutter_Lower

Address: 0x08

Access: Read

Reset Value: 0x64

Shutter_Upper

Address: 0x07

Access: Read

Reset Value: 0x00

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 automatically adjusted.

Bit

7

6

5

4

3

2

1

0

Field

Bit

7

6

5

4

3

2

1

0

Field

Figure 24. Shutter Values at 800cpi (White Paper)

Figure 25. Mean Shutter vs. Z (White Paper)

Shutter Value (White Paper)

At Z=0mm; Circle Diameter=7.5"; Speed=6ips

0

10

20

30

40

50

60

70

80

1

47

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

Count

Mean Shutter vs Z (White paper)

At Z=0mm; Circles Diameter=7.5"; Speed=6ips

0

50

100

150

200

250

300

350

400

450

500

550

600

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

Delta from Nominal Focus (mm)

Avg-3sigma

Avg

Avg+3sigma

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PixArt Imaging Inc.

PixArt Imaging Inc.

ADNS-7550 Integrated Molded Lead-Frame DIP Sensor