LSM330 Datasheet, PDF (28/75 Pages) STMicroelectronics – Power-down and sleep modes

Functionality
LSM330
4.3.8
Level-sensitive / edge-sensitive data enable
The LSM330 allows external trigger level recognition through the enabling of the EXTRen
and LVLen bits in the CTRL_REG2_G register. Two different modes can be used: level-
sensitive or edge-sensitive trigger.
Figure 12. Level-sensitive trigger stamping (LVLen = 1; EXTRen = 0)
Level-sensitive
Trigger enabled
on X-Axis
Xen=1,Yen=Zen=0
x_i,y_i,z_i
Level-sensitive
Trigger enabled
on Y-axis
Yen=1, Xen=Zen=0
x_i,y_i,z_i
Level-sensitive
Trigger enabled
on Z-axis
Zen=1, Xen=Yen=0
x_i,y_i,z_i
D
x_i(15-1) E
N
x_i-N+1 D
(15-1)
E
N
y_i(15-0)
y_i-N+1
(15-0)
Z_i(15-0)
z_i-N+1
(15-0)
x_i(15-0)
x_i-N+1
(15-0)
D
y_i(15-1) E
N
y_i-N+1
D
E
(15-1) _N
Z_i(15-0)
Z_i-N+1
(15-0)
x_i(15-0)
x_i-N+1
(15-0)
y_i(15-0)
y_i-N+1
(15-0)
D
Z_i(15-1) E
N
z_i-N+1
(15-1)
D
E
N
4.3.9
4.3.10
AM10162V1
Level-sensitive trigger stamping
Once enabled, the DEN level replaces the LSb of the X, Y or Z axes, configurable through
the Xen, Yen, Zen bits in the CTRL_REG1_G register. Data is stored in the FIFO with the
internally-selected ODR.
Edge-sensitive trigger
Once enabled by setting EXTRen = 1, FIFO is filled with the pitch, roll and yaw data on the
rising edge of the DEN input signal. When selected ODR is 800 Hz, the maximum DEN
sample frequency is f_DEN = 1/T_DEN = 400 Hz.
28/75
DocID023426 Rev 3