CMPS11 - Tilt Compensated Compass Module
Introduction
The CMPS11 is our 3rd generation tilt compensated compass. Employing a 3-axis magnetometer,
a 3-axis gyro and a 3-axis accelerometer. A Kalman filter combines the gyro and
accelerometer to remove the errors caused by tilting of the PCB.
The CMPS11 produces a result of 0-3599 representing 0-359.9 or 0
to 255. The
output of the three sensors measuring x, y and z components of the magnetic
field, together with the pitch and roll are used to calculate
the bearing, each of these components are also made available in there raw form. The CMPS11 module requires a power supply at
3.6 - 5v and draws a nominal 25mA of current. A choice of serial or I2C interfaces
are provided.
Mode selection
For data on each mode please click the mode heading. Note the CMPS11 looks
at the mode selection pin at power-up only.
| I2C mode | Serial mode | ||
|
3.6v-5v |
 |
3.6v-5v |
|
| To enter the I2C mode of operation leave the mode pin unconnected |
To enter the serial mode of operation connect the mode pin to ground |
||
The Factory use pin is for our internal testing only, this pin should
remain unconnected.
PCB Drilling Plan
The following diagram shows the CMPS11 PCB mounting hole positions.
