STV-366-R02 datasheet(13/30 Pages) STMICROELECTRONICS

13 / 30 page

VT5366

Operation

13/30

Table 5.

Reg [#0x05] - IO_Control

Add

Bits

Name

R/W

Default

Description

0x05

[0]

Motion

R/W

If set, this bit sets MOTION pin

HIGH, otherwise sets it low.

[1]

Power_Down

This bit reflects the actual value

of the signal on the

POWER_DOWN pin.

[2]

Motion PIN polarity

R/W

0: MOTION is high to indicate

that motion has been received

1: MOTION is low to indicate

that motion has been received

[3]

Motion PIN OD mode

R/W

0: MOTION output is CMOS

1.8V

1: MOTION output is OpenDrain

5V tolerant.

Table 6.

Reg [#0x20]: Clear_Motion

Add

Bits

Name

R/W

Default

Description

0x20

[0]

Empties Motion

accumulators

R/W

This bit clears both X & Y

accumulators from the current

reported value.

In case of severe overflows

generated by great motion

values, several poll motions may

be needed to completely flush

out motion from the integrator.

[1]

Enable Automatic motion

integrators to empty

automatically when reading

For X/Y motion reads via I2C i/f,

it is recommended that this bit is

set to 1 at power-up by the

master.

This way X & Y motion registers

are actually cleared

automatically after their

respective read.

X/Y motion registers should be

read in a multiple read

sequence.

Table 7.

Reg [#0x21]: X_motion

Add

Bits

Name

R/W

Default

Description

0x21

[7:0]

X_motion

0000_0000

This register holds the overall X

movement data since last polling

was done.

Value is 8 bit 2’s complement.

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