LSM9DS1 Datasheet, PDF (36/72 Pages) –

Digital interfaces
LSM9DS1
5.3.2
SPI write
Figure 25. Magnetic sensor SPI write protocol
C_CS_S_M
SPC
SDI
RW
D I7 D I6 D I5 D I4 DI3 DI2 DI1 DI0
MS AD5 AD 4 AD 3 AD2 AD 1 AD0
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, does not increment the address; when 1, 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 is written inside the device (MSb
first).
bit 16-... : data DI(...-8). Further data in multiple byte writes.
Figure 26. Multiple byte SPI write protocol (2-byte example)
CCSS _M
SPSCPC
S^SD^DI ^I
RW
DI7 D I6 DI5 D I4 DI3 DI2 DI1 DI0 DI15 D I1 4
MS _{AD5 AD4 AD3 AD2 AD1 AD 0}
DI13 D I1 2 DI11 DI10DI9 DI8
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