21

SHUT_HI

Address: 0x06

Shutter Open Time (Upper 8-bits) Register

Access: Read

Reset Value: 0x00

Bit

76543210

Field

S15

S14

S13

S12

S11

S10

S9

S8

SHUT_LO

Shutter Open Time (Lower 8-bits) Register

Access: Read

Reset Value: 0x64

Bit

76543210

Field

S7

S6

S5

S4

S3

S2

S1

S0

Data Type: Sixteen bit unsigned integer.

USAGE: Units are in clock cycles. Read SHUT_HI first, then SHUT_LO. 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.

PIX_MAX

Address: 0x08

Maximum Pixel Value Register

Access: Read

Reset Value: 0xD0

Bit

76543210

Field

MP7

MP6

MP5

MP4

MP3

MP2

MP1

MP0

Data Type: Eight-bit number.

USAGE: Store the highest pixel value in current frame. Minimum value = 0, maximum value = 254. The highest pixel

value may vary with different frame.

PIX_ACCUM

Address: 0x09

Average Pixel Value Register

Access: Read

Reset Value: 0x80

Bit

76543210

Field

AP7

AP6

AP5

AP4

AP3

AP2

AP1

AP0

Data Type: High 8-bits of an unsigned 17-bit integer.

USAGE: This register stores the accumulated pixel value of the last image taken. This register can be used to find the

average pixel value, where Average Pixel = (register value AP[7:0])* 1.058

The maximum accumulated value is 122936 but only bits [16:9] are reported, therefore the maximum register

value is 240. The minimum is 0. The PIX_ACCUM value may vary with different frame.

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PixArt Imaging Inc.

PixArt Imaging Inc.

ADNS-3000 Low Power Optical Mouse Sensor