Operation

VT5366

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5

Operation

The VT5366 provides X and Y motion information to an external processor, communication

takes place over a standard I2C bus.

5.1

I2C communication

The VT5366 is a standard I2C slave device. The 7-bit device address is 0x10, making the

I2C address 0x20 for writing and 0x21 for reading (the LSB is the read/write bit). The

maximum I2C clock speed is 400kHz. Full details of the I2C interface are given in

Chapter 6.

5.2

Register map

The VT5366 register space allows for up to 255 registers to be addressed. The sensor

address (ID) is 0x20.

5.2.1

Read motion

The key registers that are required are listed below.

5.2.2

Customer access

The rest of the customer accessible registers are listed below.

Note:

Please DO NOT write to any Addresses not mentioned below as this will affect the chip’s

performance.

Table 3.

Key register

Index (hex)

Function

Note

0x20

[1] automatic motion reset

set bit [1] to enable automatic reset of motion registers

0x21

[7:0] X-motion

2’s complement format

0x22

[7:0] Y-motion

2’s complement format

0x2F

[7:0] Minimum motion search vector Change sensitivity when going into non-run mode

Table 4.

Reg [#0x00 - 0x01] Device revisions

Add

Bits

Name

R/W

Default

Description

0x00

[7:0]

Device Hardware revision

RO

1

0x01

[3:0]

Device Firmware revision

R/W

0