28

LED_CTRL

Address: 0x40

LED Control Register

Access: Read/Write

Reset Value: 0x00

Bit

7

6543210

Field

RSVD

RSVD

RSVD

RSVD

LCOF

RSVD

RSVD

RSVD

Data Type: Eight bit unsigned integer.

USAGE: This register is used to control the LED operating mode.

Bit(s)

Field Name

Description

7:4

RSVD

Reserved

3LCOF

0 : Normal operation (default)

1 : LED Continuous Off

2:0

RSVD

Reserved

MOTION_CTRL

Address: 0x41

Motion Control Register

Access: Read/Write

Reset Value: 0x40

Bit

7

6543210

Field

MOT_A

MOT_S

RSVD

RSVD

RSVD

RSVD

RSVD

RSVD

Data Type: Eight bit unsigned integer.

USAGE: This register is used to set the feature of MOTION interrupt output. If MOT_S bit is clear, the MOTION pin is level-

sensitive. With active low (MOT_A bit is clear) level-sensitive configuration, the MOTION pin will be driven low

when there is motion detected indicating there is motion data in DELTA_X and DELTA_Y registers. The mouse

microcontroller can read MOTION_ST register, DELTA_X register, and then DELTA_Y register sequentially. After

all the motion data has been read, DELTA_X and DELTA_Y registers will be zero, the MOTION pin will be driven

high by the sensor.

If MOT_S is set, the MOTION pin is edge sensitive. If MOT_A is also set, it means active high or rising edge

triggered. Whenever there is motion detected by the sensor, a pulse (~380ns) will be sent out through this

pin. This pulse can be used to trigger or wake the controller up from its sleep mode to read motion data from

the sensor. The controller can then read MOTION_ST register, DELTA_X register, and then DELTA_Y register

sequentially. (Refer to Motion Function for more information).

Bit(s)

Field Name

Description

7

MOT_A

MOTION Active

0 : LOW (default)

1 : HIGH

6

MOT_S

MOTION Sensitivity

0 : Level sensitive

1 : Edge sensitive (default)

5:0

RSVD

Reserved

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PixArt Imaging Inc.

PixArt Imaging Inc.

ADNS-3000 Low Power Optical Mouse Sensor