27

LASER_CTRL0

Address: 0x1a

Access: Read/Write

Reset Value: 0x00

Data Type: Bit field

USAGE: This register is used to control the laser drive. Bits 7 and 6 require complement values in register 0x1F. If the

registers do not contain complementary values for these bits, the laser is turned off and the LP_VALID bit in the

MOTION register is set to 0. The registers may be written in any order after the power ON reset.

Bit

7

6

5

4

3

2

1

0

Field

Range1

Range0

Reserved

Reserved

Force_Disable

Field Name

Description

Range[1:0]

Rbin Settings

00= Laser current range from approximately 0.9mA to 3mA

01= Laser current range from approximately 2mA to 5mA

11 = Laser current range from approximately 4mA to 10mA

10 = Invalid setting, LPVALID will be set and laser will off.

Laser calibration mode

- Write 101b to bits [3,2,1] to set the laser to continuous ON (CW) mode.

- Write 000b to exit laser calibration mode, all other values are not recommended.

Reading the Motion register (0x02 or 0x42) will reset the value to 000b and exit

calibration mode.

Force_Disable

LASER force disabled

0 = LASER_NEN functions as normal

1 = LASER_NEN output is high.

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PixArt Imaging Inc.

PixArt Imaging Inc.

ADNS-7550 Integrated Molded Lead-Frame DIP Sensor