LIS3LV02DQ datasheet(21/42 Pages) STMICROELECTRONICS

Part #	LIS3LV02DQ

Description	MEMS INERTIAL SENSOR 3-Axis - -2g/-6g Digital Output Low Voltage Linear Accelerometer

PDF	42 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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LIS3LV02DQ

5 Digital Interfaces

CD00047926

21/42

5.2.2

SPI Write

Figure 7.

SPI Write protocol

The SPI Write command is performed with 16 clock pulses. Multiple byte write command is

performed adding blocks of 8 clock pulses at the previous one.

bit 0: WRITE bit. The value is 0.

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

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

bit 8-15: data DI(7:0) (write mode). This is the data that will be written inside the device (MSb

first).

bit 16-... : data DI(...-8). Further data in multiple byte writing.

Figure 8.

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_REG2.

Figure 9.

SPI Read protocol in 3-wires mode

SPC

SDI

DI7

DI6

DI5

DI4

DI3

DI2

DI1

DI0

AD5 AD4 AD3 AD2 AD1 AD0

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

AD5AD4 AD3AD2 AD1 AD0

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