IIS2DLPC datasheet(29/69 Pages) STMICROELECTRONICS

部件名	IIS2DLPC

功能描述	MEMS digital output motion sensor: high-performance ultra-low-power 3-axis accelerometer for industrial applications

PDF	69 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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29 / 69 page

DocID031788 Rev 4

29/69

IIS2DLPC

Digital main blocks

5.1

Block diagram of filters

Figure 7. Accelerometer chain

Referring to Figure 7, the first block is the Low-Pass Filter 1 (LPF1) whose behavior is a

function of the actual ODR and mode selected in CTRL1 (20h). The signal is then

downsampled and can be either directly sent to the output registers or to the Low-Pass

Filter 2 (LPF2) or High-Pass-Filter (HP) using the BW_FILT[1:0] bits and FDS bit in CTRL6

(25h).

In the low-pass path, it is possible to apply a user offset determined by the X_OFS_USR

(3Ch), Y_OFS_USR (3Dh), Z_OFS_USR (3Eh) register values and the USR_OFF_W bit in

CTRL7 (3Fh) and send the result to the output using the USR_OFF_ON_OUT bit in CTRL7

(3Fh).

In the high-pass path, it is possible to use the high-pass filter reference mode (HP) using the

HP_REF_MODE bit in CTRL7 (3Fh).

IIS2DLPC 数据表(PDF) 29 Page - STMicroelectronics