12 bit
MMA7360Q
3 Axis XYZ
Accelerometer
Development Header
20x4 Character
LCD Display
12 bit
Menu Buttons
JM60
8-bit S08 MCU
12-bit ADC
60k Flash
USB
MPXV5004
Integrated
Pressure
Sensor
MPL115A2
(I2C)
24-bit
ADC
Converter
12 bit
Temp
Sensor
Instrumentation
Amplifier
Gain=98.8
MPXM2102
Compensated
Pressure
Sensor
Figure 2. Simplified Block Diagram
is a simplified block diagram of the DEMOAPEXSENSOR. The sensors with analog outputs (Table
are sampled
via the JM60 microcontroller’s 12-bit ADC. The exception is the MPXM2102A absolute pressure sensor. This is used for altitude
so it requires a high resolution sampling. It passes through an instrumentation amplifier and then is interfaced via an external
24-bit ADC chipset before communication via SPI to the JM60 MCU. The JM60 interfaces with the LCD screen and processes
inputs by the user for the displayed output.
Several Algorithms are used to calculate functions on the DEMOAPEXSENSOR.
Information on implementing the MPL115A can be found in
Implementing the MPL115A as a barometer and altimeter can be found in
More pressure sensor application notes can be found at:
AN3956
Sensors
Freescale Semiconductor
2
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
