MPL3115A2

Sensors

30

Freescale Semiconductor, Inc.

7.11

Pressure/Altitude Window

7.11.1 P_WND_MSB, P_WND_LSB (0x19, 0x1A)

Pressure/Altitude window value. Unsigned 16-bit value of window value in meters or in 2 Pa units

7.12

Temperature Window

7.12.1 T_WND (0x1B)

Temperature alarm window value. Unsigned 8-bit value

C.

7.13

Minimum Pressure

7.13.1 P_MIN_MSB, P_MIN_CSB, P_MIN_LSB (0x1C, 0x1D, 0x1E)

Register with captured minimum Pressure/Altitude value.

The Altitude data is arranged as 20-bit 2’s complement value in meters. Stored as meters with the 16 bits of P_MIN_MSB and

P_MIN_CSB and with fractions of a meter stored in 4 bits in position 7-4 of P_MIN_LSB.

The Pressure is arranged as 20-bit unsigned data in Pascals. The first 18 bits are located in P_MIN_MSB, P_MIN_CSB and

bits 7-6 of P_MIN_LSB. The 2 bits in position 5-4 of P_MIN_LSB represent the fractional component.

The register is cleared on power-up or manually by writing ‘0’ to the registers

Table 44. P_WND_LSB Register

7

6

5

432

1

0

R

P_W15

P_W 14

P_W 13

P_W 12

P_W 11

P_W 10

P_W 9

P_W 8

W

Reset

0

0

0

000

0

0

Table 45. P_WND_MSB Description

7

6543

21

0

R

P_W7

P_W 6

P_W 5

P_W 4

P_W 3

P_W 2

P_W 1

P_W 0

W

Reset

0

0000

00

0

Table 46. T_WND Register

7

654

32

1

0

R

T_W7

T_W6

T_W5

T_W4

T_W3

T_W2

T_W1

T_W0

W

Reset

0

000

00

0

0

Table 47. P_MIN_MSB Register

7

6

5

43

210

R

P_MIN 19

P_MIN 18

P_MIN 17

P_MIN 16

P_MIN 15

P_MIN 14

P_MIN 13

P_MIN 12

W

Reset

0

0

0

00

000

Table 48. P_MIN_CSB Register

7

654

32

1

0

R

P_MIN 11

P_MIN 10

P_MIN 9

P_MIN 8

P_MIN 7

P_MIN 6

P_MIN 5

P_MIN 4

W

Reset

0

000

00

0

0

Table 49. P_MIN_LSB Register

7

6543

21

0

R

P_MIN 3

P_MIN 2

P_MIN 1

P_MIN0

00

00

W

Reset

0

0000

00

0