Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
MPL3115A2
Sensors
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc.
29
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
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
5
4
3
2
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
0
0
0
0
0
0
Table 51. P_MAX_CSB Register
7
6
5
4
3
2
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
0
0
0
0
0
0
Table 52. P_MAX_LSB Register
7
6
5
4
3
2
1
0
R
P_MAX 3
P_MAX 2
P_MAX 1
P_MAX0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
Table 53. T_MIN_MSB Register
7
6
5
4
3
2
1
0
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
0
0
0
0
0
Table 54. T_MIN_LSB Register
7
6
5
4
3
2
1
0
R
T_MIN 3
T_MIN 2
T_MIN 1
T_MIN 0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0