STEVAL-MKI092V1 STMicroelectronics, STEVAL-MKI092V1 Datasheet - Page 26

• Manufacturer Part Number: STEVAL-MKI092V1
• Description: BOARD DEMO FOR LIS331HH
• Manufacturer: STMicroelectronics
• Series: MEMS, nanor

Specifications of STEVAL-MKI092V1

• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±6g, 12g, 24g
• Interface: I²C, SPI
• Sensitivity: 12mg/digit, 6mg/digit, 3mg/digit
• Embedded: No
• Utilized Ic / Part: LIS331HH
• Acceleration: 6 g, 12 g, 24 g
• Sensing Axis: Triple Axis
• Interface Type: I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: LIS331HH
• Other names: 497-10523

Register description
7.3
26/37
inside corresponding internal registers and it is used to calibrate the device. These values
are factory trimmed and they are different for every accelerometer. They permit a good
behavior of the device and normally they have not to be changed. At the end of the boot
process the BOOT bit is set again to ‘0’.
Table 22.
HPCF[1:0]. These bits are used to configure high-pass filter cut-off frequency ft which is
given by:
The equation can be simplified to the following approximated equation:
Table 23.
CTRL_REG3 [Interrupt CTRL register] (22h)
Table 24.
Table 25.
HPcoeff2,1
IHL
PP_OD
IHL
00
01
10
11
HPM1
0
0
1
High-pass filter mode configuration
High-pass filter cut-off frequency configuration
CTRL_REG3 register
CTRL_REG3 description
Data rate = 50 Hz
PP_OD
Interrupt active high, low. Default value: 0
(0: active high; 1:active low)
Push-pull/Open drain selection on interrupt pad. Default value 0.
(0: push-pull; 1: open drain)
f
0.125
t
0.25
0.5
[Hz]
1
HPM0
0
1
0
LIR2
Doc ID 16366 Rev 1
Data rate = 100 Hz
f
I2_CFG1
t
Normal mode (reset reading HP_RESET_FILTER)
Reference signal for filtering
Normal mode (reset reading HP_RESET_FILTER)
=
f
f
t
0.25
ln
t
0.5
[Hz]
2
1
⎛
⎝
=
1
--------------------- -
6
–
⋅
----------- -
HPc
f
1
I2_CFG0
HPc
s
⎞
⎠
⋅
Data rate = 400 Hz
High-pass filter mode
------
2π
f
s
f
t
[Hz]
LIR1
8
4
2
1
I1_CFG1
Data rate = 1000 Hz
f
t
2.5
[Hz]
20
10
5
LIS331HH
I1_CFG0