32

Frame_Period_Lower

Address: 0x10

Access: Read

Reset Value: Undefined

Bit

7

6

5

4

3

2

1

0

Field

Frame_Period_Upper

Address: 0x11

Access: Read

Reset Value: Undefined

Bit

7

6

5

4

3

2

1

0

Field

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.

Frames/second

Counts

Frame_Period

Decimal

Hex

Upper

Lower

6469

3,710

OE7E

OE

7E

5000

4,800

12C0

12

C0

3000

8,000

1F40

1F

40

2000

12,000

2EE0

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.

PixArt Imaging Inc.