Data Sheet

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LSM9DS1 Digital interfaces
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bit 8-15: data DI(7:0) (write mode). This is the data that is written inside the device (MSb
first).
bit 16-... : data DI(...-8). Further data in multiple byte writes.
Figure 20. Multiple byte SPI write protocol (2-byte example)
5.2.3 SPI read in 3-wire mode
3-wire mode is entered by setting the CTRL_REG8 (22h)(SIM) bit equal to ‘1’ (SPI serial
interface mode selection).
Figure 21. Accelerometer and gyroscope 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 1-7: address AD(6:0). 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).
A multiple read command is also available in 3-wire mode.
CS
SPC
SDI
RW
AD5 AD4 AD3 AD2 AD1 AD0
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
AD6
CS_A/G
CS
SPC
SDI/O
RW
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
AD5 AD4 AD3 AD2 AD1 AD0
AD6
CS_A/G