24

Product_ID

Address: 0x00

Access: Read

Reset Value: 0x07

Bit

76543210

Field

Data Type: 8-Bit unsigned integer.

USAGE: This register contains the IC revision. It is subject to change when new IC versions are released.

NOTE: The downloaded SROM firmware revision is a separate value and is available in the SROM_ID register.

Motion

Address: 0x02

Access: Read

Reset Value: 0x00

Bit

7

6

5

4

3

2

1

0

Field

MOT

Reserved

Reserved

OVF

Reserved

Reserved

Reserved

RES

Data Type: Bit field.

USAGE: Register 0x02 allows the user to determine if motion has occurred since the last time it was read. If so, then

the user should read registers 0x03 and 0x04 to get the accumulated motion. It also tells if the motion buffers have

overflowed, and the current resolution setting.

Field Name

Description

MOT

Motion since last report or PD

0 = No motion

1 = Motion occurred, data ready for reading in Delta_X and Delta_Y registers

OVF

Motion overflow, Delta_Y and/or Delta_X buffer has overflowed since last report

0 = no overflow

1 = Overflow has occurred

RES

Resolution in counts per inch

0 = 3500

1 = 1800

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PixArt Imaging Inc.

PixArt Imaging Inc.

Bit

76543210

Field

Data Type: 8-Bit unsigned integer

USAGE: This register contains a unique identification assigned to the ADNS-3090. The value in this register does not

change; it can be used to verify that the serial communications link is functional.

Revision_ID

Address: 0x01

Access: Read

Reset Value: 0xNN