MPL3115A2 datasheet(24/44 Pages) FREESCALE

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MPL3115A2

Sensors

Freescale Semiconductor, Inc.

7.1.4

OUT_P_DELTA_MSB (0x07), OUT_P_DELTA_CSB (0x08), OUT_P_DELTA_LSB (0x09),

OUT_T_ DELTA_MSB (0x0A), OUT_T_DELTA_LSB (0x0B)

Differences from last Pressure/Altitude and Temperature samples.

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

OUT_P_DELTA_MSB and OUT_P_DELTA_CSB and with fractions of a meter stored in 4 bits in position 7-4 of

OUT_P_DELTA_LSB.

The Pressure is arranged as 20-bit 2’s complement value in Pascals. The first 18 bits are located in OUT_P_DELTA_MSB,

OUT_P_DELTA_CSB and bits 7-6 of OUT_P_DELTA_LSB. The 2 bits in position 5-4 of OUT_P_DELTA_LSB represent the frac-

tional component.

The Temperature data is arranged as 12-bit values in degrees C. The 8 bits of OUT_T_DELTA_MSB representing degrees

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

In RAW mode, these registers are not used and their values are not updated.

Note: The OUT_P_DELTA, OUT_T_DELTA registers store the difference data information regardless of the state of the FIFO

data output register driver bit, F_MODE > 00.

Table 19. OUT_P_DELTA _MSB Register

6543

PDD19

PDD18

PDD17

PDD16

PDD15

PDD14

PDD13

PDD12

Reset

00000

Table 20. OUT_P_DELTA_CSB Register

654

PDD11

PDD10

PDD9

PDD8

PDD7

PDD6

PDD5

PDD4

Reset

000

Table 21. OUT_P_DELTA_LSB Register

654

TDD3

TDD2

TDD1

TDD0

Reset

000

Table 22. OUT_T_DELTA _MSB Register

6543

TDD11

TDD10

TDD9

TDD8

TDD7

TDD6

TDD5

TDD4

Reset

00000

Table 23. OUT_T_DELTA_LSB Register

210

TDD3

TDD2

TDD1

TDD0

Reset

000

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