Copyright © Parallax Inc. Altimeter Module MS5607 (#29124) v1.0 11/3/2011 Page 2 of 5
Quick-Start Guide
The following is a very basic procedure to get started initializing and reading values from the Altimeter
Module. Example test code can be found on the 29124 product page at www.parallax.com.
This module’s default communication setup is I²C. Use of SPI communication is configured by pulling the
PS pin low. See the datasheet for SPI configuration and use.
1. With main power off, make the proper connections between the module and a microcontroller as
shown below. The voltage connected to the VIN pin should be the same as the voltage powering
the microcontroller communicating with the device.
2. Power on the device and load the sample code provided on our product page.
NOTE: The SDA pin is connected to a bi-directional level shifting IC, used to translate the lower
I/O voltage of the MS5607 to the possibly higher voltage used by an externally connected device.
This particular level shifter has built-in pull-up resistors to each supply rail so it can be driven by
open drain outputs for I
2
C; but can also be driven low/high for SPI protocol. The CLK, PS and CS
pins operate exclusively as inputs, so a simpler level shifting circuit with a resistor and Schottky
diode is used. For the SDO pin another simple level shifting circuit is used along with a MOSFET
and two resistors.
In summary, there is no need for any external hardware to operate.
Precautions
This sensor is moisture sensitive and was manufactured with “no-clean” solder paste. Please take
steps to protect unit in wet environments.
The pressure sensor is light sensitive; direct light will give false readings. Indirect light is okay.
Calibration
There is no need to calibrate the module since every sensor is individually factory calibrated at two
temperatures and two pressures. These calibration tests are stored on the sensor itself and are part of
the onboard ROM data.
