ADNS-3530 Avago Technologies US Inc., ADNS-3530 Datasheet - Page 20

• Manufacturer Part Number: ADNS-3530
• Description: Small Form Factor COB LED Sensor
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-3530

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

Pixel_Sum
Access: Read
Data Type:
USAGE:
Minimum_Pixel
Access: Read
Data Type:
USAGE:
Pixel_Grab
Access: Read/Write
Data Type:
USAGE:
20
Field
Field
Field
Bit
Bit
Bit
High 8 bits of an unsigned 17-bit integer
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:
The maximum register value is 240. The minimum is 0. The pixel sum value can change on every
frame.
Eight-bit number
Minimum Pixel value in current frame. Minimum value = 0, maximum value = 254. The minimum pixel
value can vary with every frame.
Eight-bit word
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 register 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 register to read out. After
the data in this register is read, the pointer will automatically increment to the next pixel. Reading may
continue indefinitely; 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 address pointer will start at the beginning location
again.
Reset Value: Undefined
Address: 0x09
MP
PD
AP
7
7
7
7
7
7
Average Pixel = Register Value * 128/121 = Register Value * 1.06
Address: 0x0a
Reset Value: Undefined
Address: 0x0b
Reset Value: Undefined
MP
AP
PD
6
6
6
6
6
6
MP
AP
PD
5
5
5
5
5
5
MP
PD
AP
4
4
4
4
4
4
MP
AP
PD
3
3
3
3
3
3
MP
PD
AP
2
2
2
2
2
2
MP
PD
AP
1
1
1
1
1
1
MP
AP
PD
0
0
0
0
0
0