LSM330DL datasheet(26/54 Pages) STMICROELECTRONICS

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Digital interfaces

LSM330DL

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Doc ID 022018 Rev 1

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

command is performed adding blocks of 8 clock pulses to the previous one.

bit 0: WRITE bit. The value is 0.

bit 1: MS bit. When 0, this bit does not increment the address, when 1, it increments the

address in multiple writes.

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 writes.

Figure 10.

Multiple bytes SPI write protocol (2 bytes example)

5.2.3

SPI read in 3-wire mode

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

CTRL_REG4.

Figure 11.

SPI read protocol in 3-wire 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, this bit does not increment the address, when 1, it increments the

address in multiple reads.

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 will be read from the device (MSb

first).

The multiple read command is also available in 3-wire 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

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