Figure 5. SPI Start Conversion Datagram
Command to Start Pressure and Temperature Conversion, 0x24
Figure 6. SPI Read Results Datagram
Pressure MSB
= 0x67
Pressure LSB
= 0xC0
Pressure
= 0x67C0
= 0110 0111 11 00 0000
= 415 ADC counts
Temperature MSB = 0x80
Temperature LSB
= 0x40
Temperature
= 0x8040
= 1000 0000 01 00 0000
= 513 ADC counts
3.7
Example of Pressure Compensated Calculation in Floating-point Notation
a0 coefficient
b1 coefficient
b2 coefficient
=
=
=
2107.875
-2.49512
-1.02069
c12 coefficient =
0.00086665
Pressure
Temperature
=
=
415 ADC counts
513 ADC counts
Pressure Compensation:
Pcomp = a0 + ( b1 + c12 ? Tadc ) ? Padc + b2 ? Tadc
MPL115A1
Sensors
10
Freescale Semiconductor, Inc.
相关PDF资料
KITMPL115A2I2C KIT EVALUATION FOR PL115A2I2C
KITMPVZ5004EVK KIT EVAL PRESSURE SENS BOARD
KN500B1/4 SWITCH KNOB STRAIGHT .50" BLACK
KN5700B1/4 SWITCH KNOB STRAIGHT .75" BLACK
KN700B1/4 SWITCH KNOB STRAIGHT .75" BLACK
KS-100 PROTECTIVE COVER FOR RELAYS
KTKK-0500 CONN HEAT SHRINK TUBE SZ 8 STR
KTKK-0674 CONN HEAT SHRINK TUBE SZ E STR
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