Sensors

14

Freescale Semiconductor, Inc.

MMA16xxKW

3.1.2

Device Type Register (TYPE)

The Device Type Register is an OTP configuration register which contains device configuration information. Bit 5 - Bit 0 are

factory programmed and are included in the factory programmed OTP CRC verification. These bits are read only to the user. Bit

7 - Bit 6 are user programmable OTP bits and are included in the user programmable OTP CRC verification.

3.1.2.1

Low-Pass Filter Selection Bits (LPF[1:0]) (TYPE[7:6])

The Low-Pass Filter selection bit selects between one of three low-pass filter options. These bits can be factory or user pro-

grammed.

This filter option is not implemented. LPF[1:0] must not be set to this value to guarantee proper operation and performance.

3.1.2.2

Range Selection Bits (RNG[3:0]) (TYPE[3:0])

The Range Selection Bits indicate the full-scale range of the device, as shown below. These bits are factory programmed.

Table 3. Factory Configuration Register

Location

Bit

RA[3:0]

Register

WA[3:0]

7

6

5

4

WA[3:0]

3

2

1

0

$04

TYPE

Bnk0 $08

LPF[1]

LPF[0]

0

0

RNG[3]

RNG[2]

RNG[1]

RNG[0]

Factory Default

0000

0000

LPF[1]

LPF[0]

Low-Pass Filter Selected

0

0

400 Hz, 4-Pole

0

1

1

0

180 Hz, 2-Pole

1

1

800 Hz, 4-Pole

RNG[3]

RNG[2]

RNG[1]

RNG[0]

Full-Scale Range

g-Cell Design

0000

N/A

N/A

0001

N/A

N/A

0010

50g

Medium-g

0011

62g

Medium-g

0100

125g

Medium-g

0101

187g

High-g

0110

312g

High-g

0111

N/A

N/A

1000

Reserved

N/A

1001

1010

1011

1100

1101

1110

1111