UM0704
System operation
Doc ID 15731 Rev 1
7/18
For example, let's suppose the board is in the equilibrium position and the Y-axis of the
board is fixed, if the X-axis of the board is tilted in an upward/left direction, then at an
inclination of, say, 14 degrees, D7 glows. If the inclination is increased further to 28 degrees,
D5 and D9 are turned on. After that D3 and D11 are turned on and so on (see
When the board is inclined at a right angle (the X-axis of the board is at 90 degrees to
ground plane), all the outer circle LEDs are turned on. The LEDs start turning off in the
same fashion when the board detects a reverse movement. ([D6], [D4, D8], [D2, D10], [D1,
D12] and so on).
Similarly, starting from the equilibrium position, while keeping the Y-axis of the board fixed, if
the X-axis of the board is tilted downwards/right, the outer circle LEDs start glowing
beginning from D6. At an inclination of, say, 14 degrees, D6 glows. If the inclination is
increased further to 28 degrees, D4 and D8 are turned on. After that D2 and D10 are turned
on and so on (see
). When, the board is inclined at a right angle (the X-axis of the
board is at 90 degrees to ground plane), all the outer circle LEDs are turned on. The LEDs
start turning off in the same fashion when the board detects a reverse movement ([D7], [D5,
D9], [D3, D11], [D1, D12] and so on)
Tilt on the Y-axis
If the X-axis of the board/MEMS is kept fixed, the board is tilted on the Y-axis (see
and
), then the system measures the tilt on the Y-axis and this information is shown using
the LEDs on the inner circle of the board.
Figure 5.
Tilt in the X-axis in a left direction
Figure 6.
Tilt in the X-axis in a right direction
AM042
3
0
3
v1
AM042
3
04v1
www.BDTIC.com/ST
