MPL3115A2

Sensors

Freescale Semiconductor, Inc.

31

7.14

Maximum Pressure

7.14.1 P_MAX_MSB, P_MAX_CSB, P_MAX_LSB (0x21, 0x22, 0x23)

Register with captured maximum 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_MAX_MSB

and P_MAX_CSB and with fractions of a meter stored in 4 bits in position 7-4 of P_MAX_LSB.

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

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

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

7.15

Minimum Temperature

7.15.1 T_MIN_MSB, T_MIN_LSB (0x1F, 0x20)

Register with captured minimum temperature value.

The Temperature data is arranged as 12-bit 2’s complement value in degrees C. The 8 bits of T_MIN_MSB representing de-

grees and with fractions of a degree stored in 4 bits in position 7-4 of T_MIN_LSB.

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

Table 50. P_MAX_MSB Register

7

6

5432

1

0

R

P_MAX 19

P_MAX 18

P_MAX 17

P_MAX 16

P_MAX 15

P_MAX 14

P_MAX 13

P_MAX 12

W

Reset

0

0

0000

0

0

Table 51. P_MAX_CSB Register

7

6

5432

1

0

R

P_MAX 11

P_MAX 10

P_MAX 9

P_MAX 8

P_MAX 7

P_MAX 6

P_MAX 5

P_MAX 4

W

Reset

0

0

0000

0

0

Table 52. P_MAX_LSB Register

7

6

5432

1

0

R

P_MAX 3

P_MAX 2

P_MAX 1

P_MAX0

00

0

0

W

Reset

0

0

0000

0

0

Table 53. T_MIN_MSB Register

7

6

5

43

210

R

T_MIN 11

T_MIN 10

T_MIN 9

T_MIN 8

T_MIN 7

T_MIN 6

T_MIN 5

T_MIN 4

W

Reset

0

0

0

00

000

Table 54. T_MIN_LSB Register

7

6543

21

0

R

T_MIN 3

T_MIN 2

T_MIN 1

T_MIN 0

00

00

W

Reset

0

0000

00

0