21

Pixel_Sum

Address: 0x09

Access: Read

Reset Value: Undefined

Bit

7

6

5

4

3

2

1

0

Field

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

USAGE: This register is used to find the average pixel value. It reports the seven bits of a 16-bit counter, which sums

all pixels in the current frame. It may be described as the full sum divided by 512. To find the average pixel

value, use the following formula:

Average Pixel = Register Value * 128/121 = Register Value * 1.06

The maximum register value is 240. The minimum is 0. The pixel sum value can change on every frame.

Minimum_Pixel

Address: 0x0a

Access: Read

Reset Value: Undefined

Bit

7

6

5

4

3

2

1

0

Field

Data Type: Eight-bit number

USAGE: Minimum Pixel value in current frame. Minimum

value = 0, maximum value = 254. The minimum

pixel value can vary with every frame.

Pixel_Grab

Address: 0x0b

Access: Read/Write

Reset Value: Undefined

Bit

7

6

5

4

3

2

1

0

Field

Data Type: Eight-bit word

USAGE: For test purposes, the sensor will read out the

contents of the pixel array, one pixel per frame.

To start a pixel grab, write anything to this reg-

ister to reset the pointer to pixel 0,0. Then read

the PIXRDY bit in the Motion register. When the

PIXRDY bit is set, there is valid data in this reg-

ister to read out. After the data in this register

is read, the pointer will automatically increment

to the next pixel. Reading may continue indefi-

nitely; once a complete frame’s worth of pixels

has been read, PIXFIRST will be set to high to

indicate the start of the first pixel and the ad-

dress pointer will start at the beginning loca-

tion again.