MMA8453Q

Sensors

22

Freescale Semiconductor, Inc.

0x0D: WHO_AM_I Device ID Register

The device identification register identifies the part. The default value is 0x3A. This value is factory programmed. Consult the

factory for custom alternate values.

0x0E: XYZ_DATA_CFG Register

The XYZ_DATA_CFG register sets the dynamic range.

The default full scale value range is 2g and the high pass filter is disabled.

0x0F: HP_FILTER_CUTOFF High Pass Filter Register

This register sets the high-pass filter cut-off frequency for removal of the offset and slower changing acceleration data. The

filter cut-off options change based on the data rate selected as shown in Table 19. For details of implementation on the high pass

filter, refer to Freescale application note, AN4071.

0x0D: WHO_AM_I Device ID Register (Read Only)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0

011

1

0

1

0

0x0E: XYZ_DATA_CFG (Read/Write)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0

000

0

0

FS1

FS0

Table 16. XYZ Data Configuration Descriptions

FS[1:0]

Output buffer data format full scale. Default value: 00 (2g).

Table 17. Full Scale Range

FS1

FS0

Full Scale Range

00

2

01

4

10

8

11

Reserved

0x0F HP_FILTER_CUTOFF: High Pass Filter Register (Read/Write)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0

0

Pulse_HPF_BYP Pulse_LPF_EN

0

0

SEL1

SEL0

Table 18. High Pass Filter Cut-off Register Descriptions

Pulse_HPF_BYP

Bypass High Pass Filter for Pulse Processing Function.

0: HPF enabled for Pulse Processing, 1: HPF Bypassed for Pulse Processing

Default value: 0.

Pulse_LPF_EN

Enable Low Pass Filter for Pulse Processing Function.

0: LPF disabled for Pulse Processing, 1: LPF Enabled for Pulse Processing

Default value: 0.

SEL[1:0]

HPF Cut-off frequency selection.

Default value: 00 (see Table 19

).