Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
MPL3115A2
Sensors
22
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)
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.
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.
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
7
6
5
4
3
2
1
0
R
PDD19
PDD18
PDD17
PDD16
PDD15
PDD14
PDD13
PDD12
W
Reset
0
0
0
0
0
0
0
0
Table 20. OUT_P_DELTA_CSB Register
7
6
5
4
3
2
1
0
R
PDD11
PDD10
PDD9
PDD8
PDD7
PDD6
PDD5
PDD4
W
Reset
0
0
0
0
0
0
0
0
Table 21. OUT_P_DELTA_LSB Register
7
6
5
4
3
2
1
0
R
TDD3
TDD2
TDD1
TDD0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
Table 22. OUT_T_DELTA _MSB Register
7
6
5
4
3
2
1
0
R
TDD11
TDD10
TDD9
TDD8
TDD7
TDD6
TDD5
TDD4
W
Reset
0
0
0
0
0
0
0
0
Table 23. OUT_T_DELTA_LSB Register
7
6
5
4
3
2
1
0
R
TDD3
TDD2
TDD1
TDD0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0