Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트

Sensors
Freescale Semiconductor, Inc.

15

The Transient Detection function can be routed to either interrupt pin through bit 5 in CTRL_REG5 register (0x2E). Registers 
0x1D – 0x20 are the dedicated Transient Detection configuration registers. The source register contains directional data to 
determine the direction of the acceleration (either positive or negative). 

The MMA8652FC has embedded single/double and directional tap detection. 

•

The tap detection function has various customizing timers, for setting the pulse time width and the latency time between 
pulses. There are programmable thresholds for all three axes. 

•

The tap detection can be configured to run through the high-pass filter and also through a low-pass filter, which provides 
more customizing and tunable tap detection schemes. 

•

The status register provides updates on the axes where the event was detected and the direction of the tap. 

The MMA8652FC incorporates an advanced orientation detection algorithm with the ability to detect all six orientations shown in 

. The embedded algorithm uses configurable trip points, allowing the selection of the desired midpoint and hysteresis 

value (see 

Figure 7

).

PORTRAIT UP

Xout @ 0 g
Yout @ –1 g
Zout @ 0 g

Xout @ 1 g
Yout @ 0 g
Zout @ 0 g

Xout @ 0 g
Yout @ 1 g
Zout @ 0 g

Xout @ –1 g
Yout @ 0 g
Zout @ 0 g

LANDSCAPE LEFT

PORTRAIT DOWN

LANDSCAPE RIGHT

FRONT

Xout @ 0 g
Yout @ 0 g
Zout @ 1 g

BACK

Xout @ 0 g
Yout @ 0 g
Zout @ –1 g

(Top View)

Direction of the 

Detectable Accelerations