LSM330DL Datasheet, PDF (26/54 Pages) STMicroelectronics – Linear sensor module 3D accelerometer sensor and 3D gyroscope sensor

Digital interfaces
LSM330DL
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)
CS
SPC
SDI
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
RW
MS AD5 AD4 AD3 AD2 AD1 AD0
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
CS
SPC
SDI/O
RW
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
MS AD5 AD4 AD3 AD2 AD1 AD0
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.
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Doc ID 022018 Rev 1