LIS331DLF datasheet(22/38 Pages) STMICROELECTRONICS

部件名	LIS331DLF

功能描述	MEMS digital output motion sensor ultra low-power high performance 3-axes ?쐍ano??accelerometer

PDF	38 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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22 / 38 page

Digital interfaces

LIS331DLF

22/38

Doc ID 15101 Rev 4

Figure 10.

Multiple bytes SPI write protocol (2 bytes example)

5.2.3

SPI read in 3-wires mode

3-wires mode is entered by setting to ‘1’ bit SIM (SPI serial interface mode selection) in

CTRL_REG4.

Figure 11.

SPI read protocol in 3-wires mode

The SPI Read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

bit 1: MS bit. When 0 do not increment address, when 1 increment address in multiple

reading.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DO(7:0) (read mode). This is the data that is read from the device (MSb first).

Multiple read command is also available in 3-wires mode.

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

SPC

SDI/O

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

LIS331DLF 数据表(PDF) 22 Page - STMicroelectronics