VT5376 datasheet(15/30 Pages) STMICROELECTRONICS

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VT5376

I2C control register map

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0x27

[0]

Invert X

Allows X to be inverted (2)

[1]

Invert Y

Allows Y to be inverted(2)

[3]

Swap XY

Replaces X with Y and Y with X

[5]

Test Pattern Enabled

0: Normal mode

1: Diamond shape pattern

[7]

Test Pattern Speed

Diamond test pattern speed -

0x0 : motion = 127 max speed

0x1 : motion = 64

0x2 : motion = 32

0x3 : motion = 16

0x29

[7:0]

Min_features[13:6]

0000_0100

This register represents the feature

threshold below which motion is no

longer valid (in this case, the device

reports “0” motion). This is linked to

the value reported in registers

0x31/0x32

0x2A

[7:0]

Scaling for X motion vectors

0001_0000

Sets resolution as CPI:

8: 400 CPI

16: 800 CPI

Assuming lens magnification of x0.5

0x2B

[7:0]

Scaling for Y motion vectors

0001_0000

Sets resolution as CPI:

0x08: 400 CPI

0x10: 800 CPI

Assuming lens magnification of x 0.5

0x31

[15:8]

Features count

Feature count report: the higher the

value, the more distinctive features the

surface requires, for the motion

detection machine to operate reliably.

0x32

[7:0]

0x41

[7:0]

Exposure [8:1]

80h

Exposure value in 2 x CLK12 period

units

0x43

[4]

Auto Expo En

Auto exposure enable

0x47

[7:0]

Vbat converted data

This register holds the current

converted data from the Vbat input

voltage.

The data range is as follows:

0000_0000: Vbat = 0.6 V

1111_1111: Vbat = 1.6 V

The response is linear for each value

in between. ADC step: 1V/256 =

3.9mV

0x4F

[7:0]

Exp max value

This registers holds the maximum

pixel value (before CDS) for the

current frame. It shows if some pixels

are saturated or not.

Table 7.

I2C control register map (continued)

Address

Bits

Name

R/W

Default

Description

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