PixArt Imaging Inc.
ADNS-3090 High-Performance Optical Mouse Sensor
Frame_Period_Lower
Address: 0x10
Access: Read
Reset Value: Undefined
Bit
7
6
5
4
3
2
1
0
Field
FP
FP
FP
FP
FP
FP
FP
FP
7
6
5
4
3
2
1
0
Frame_Period_Upper
Address: 0x11
Access: Read
Reset Value: Undefined
Bit
7
6
5
4
3
2
1
0
Field
FP
FP
FP
FP
FP
FP
FP
FP
15
14
13
12
11
10
9
8
Data Type: Sixteen bit unsigned integer.
USAGE: Read these registers to determine the current frame period and to calculate the frame rate. Units are clock
cycles. The formula is
Frame Rate = Clock Frequency/Register value
To read from the registers, read Frame_Period_Upper first followed by Frame_Period Lower.
To set the frame rate manually, disable automatic frame rate mode via the Extended_Config register and write the
desired count value to the Frame_Period_Maximum_Bound registers.
The following table lists some Frame_Period values for popular frame rates with a 24MHz clock.
Counts
Frame_Period
Frames/second
6469
Decimal
3,710
Hex
Upper
OE
Lower
7E
OE7E
12C0
1F40
2EE0
5000
4,800
12
C0
3000
8,000
1F
40
2000
12,000
2E
E0
Motion_Clear
Address: 0x12
Access: Write
Reset Value: Undefined
Data Type: Any.
USAGE: Writing any value to this register will cause the Delta_X, Delta_Y, and internal motion registers to be cleared.
Use this as a fast way to reset the motion counters to zero without resetting the entire chip.
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
32
PIXART [ PIXART IMAGING INC. ]
