LSM330DLCTR datasheet(37/66 Pages) STMICROELECTRONICS

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LSM330DLC

Digital interfaces

Doc ID 022162 Rev 2

37/66

6.2.2

SPI write

Figure 17.

SPI write protocol

The SPI write command is performed with 16 clock pulses. A multiple-byte write command

is performed by adding blocks of 8 clock pulses to 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 to the device (MSb

first).

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

Figure 18.

Multiple bytes SPI write protocol (2 bytes example)

6.2.3

SPI read in 3-wire mode

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

the CTRL_REG4_G register.

SPC

SDI

DI7

D I6 DI5

D I4 DI3

DI2

DI1 DI0

AD5 AD 4 AD 3 AD2 AD 1 AD0

AM10132V1

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD 0

DI7 D I6 DI5 D I4 DI3 DI2 DI1 DI0 DI15 D I1 4DI13 DI12DI11 DI10 DI9 DI8

AM10133V1

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