28

Registers

The ADNS-2051 can be programmed through registers, via the serial port, and configuration and motion

data can be read from these registers.

Address

Register

0x00

Product_ID

0x01

Revision_ID

0x02

Motion

0x03

Delta_X

0x04

Delta_Y

0x05

SQUAL

Address

Register

0x06

Average_Pixel

0x07

Maximum_Pixel

0x08

Reserved

0x09

Reserved

0x0a

Configuration_bits

0x0b

Reserved

Address

Register

0x0c

Data_Out_Lower

0x0d

Data_Out_Upper

0x0e

Shutter_Lower

0x0f

Shutter_Upper

0x10

Frame_Period_Lower

0x11

Frame_Period_Upper

Bit

76

5

4

32

10

Field

Data Type: Eight bit number with the product identifier.

USAGE: The value in this register does not change, it can be used to verify

that the serial communications link is OK.

Product_ID

Address: 0x00

Access: Read

Reset Value: 0x02

Bit

76

5

4

32

10

Field

Data Type: Eight bit number with current revision of the IC.

USAGE: NN is a value between 00 and FF which represent the current design

revision of the device.

Revision_ID

Address: 0x01

Access: Read

Reset Value: 0xNN

Bit

7

6

5

4

3

2

1

0

Field

MOT

Reserved

FAULT

OVFY

OVFX

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 whether or not an LED fault occurred since the last reading. The current resolution is also shown.

Motion

Address: 0x02

Access: Read

Reset Value: 0x00