MMA8653FC datasheet(30/56 Pages) FREESCALE

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MMA8653FC

Sensors

Freescale Semiconductor, Inc.

6.5.3

0x12: PL_COUNT, Portrait/Landscape Debounce Counter Register

This register sets the debounce count for the orientation state transition. The minimum debounce latency is determined by the

data rate set by the product of the selected system ODR and PL_COUNT registers. Any transition from WAKE to SLEEP or vice

versa resets the internal Landscape/Portrait debounce counter.

NOTE

The debounce counter weighting (time step) changes based on the ODR and the

Oversampling mode. Table 21, “PL_COUNT Relationship with the ODR" explains the time

step value for all sample rates and all Oversampling modes.

Figure 28. 0x12: PL_COUNT, Portrait/Landscape Debounce Counter Register (Read/Write)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

DBNCE[7]

DBNCE[6]

DBNCE[5]

DBNCE[4]

DBNCE[3]

DBNCE[2]

DBNCE[1]

DBNCE[0]

Table 20. PL_COUNT register

Field

Description

DBCNE[7:0]

Debounce Count value. Default value: 0000_0000.

Table 21. PL_COUNT Relationship with the ODR

ODR (Hz)

Max Time Range (s)

Time Step (ms)

Normal

LPLN

HighRes

Normal

LPLN

HighRes

800

0.319

1.25

400

0.638

2.5

200

1.28

0.638

1.28

2.5

100

2.55

0.638

2.55

2.5

5.1

0.638

5.1

2.5

12.5

5.1

20.4

0.638

20.4

2.5

6.25

5.1

20.4

0.638

40.8

2.5

160

1.56

5.1

20.4

0.638

40.8

2.5

160

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