MPL3115A2

Sensors

Freescale Semiconductor, Inc.

29

7.8

Barometric Pressure Input

7.8.1

BAR_IN_MSB, BAR_IN_LSB (0x14, 0x15)

Barometric input for altitude calculations. Input is equivalent sea level pressure for measurement location.

Value is input in 2 Pa units.

Units are input as unsigned 16-bit integers. The default value is 101,326 Pa. The default value can be changed by writing to

this register

7.9

Pressure/Altitude Target

7.9.1

P_TGT_MSB, P_TGT_LSB (0x16, 0x17)

Altitude/Pressure target value. This value works in conjunction with the window value (P_WND_MSB and P_WND_LSB).

In Altitude mode, the register value is 16-bit 2’s complement value in meters.

In Pressure mode, the value is 16-bit unsigned value in 2 Pa units.

7.10

Temperature Target

7.10.1 T_TGT (0x18)

Temperature target value input in 2’s complement value in

C.

Table 39. BAR_IN_MSB Register

7

6543

21

0

R

BAR[15]

BAR[14]

BAR[13]

BAR[12]

BAR[11]

BAR[10]

BAR[9]

BAR[8]

W

Reset

1

1000

10

1

Table 40. BAR_IN_LSB Register

7

6

5

43

210

R

BAR[7]

BAR[6]

BAR[5]

BAR[4]

BAR[3]

BAR[2]

BAR[1]

BAR[0]

W

Reset

1

1

1

00

111

Table 41. P_TGT_MSB Register

7

6

5

43

210

R

P_TGT15

P_TGT14

P_TGT13

P_TGT12

P_TGT11

P_TGT10

P_TGT9

P_TGT8

W

Reset

0

0

0

00

000

Table 42. P_TGT_LSB Register

7

6543

21

0

R

P_TGT7

P_TGT6

P_TGT5

P_TGT4

P_TGT3

P_TGT2

P_TGT1

P_TGT0

W

Reset

0

0000

00

0

Table 43. T_TGT Register

7

6

5

43

210

R

T_TGT7

T_TGT6

T_TGT5

T_TGT4

T_TGT3

T_TGT2

T_TGT1

T_TGT0

W

Reset

0

0

0

00

000