LSM303C Datasheet, PDF (28/53 Pages) –

Digital interfaces
LSM303C
6.2.3
bit 8-15: data DO(7:0) (read mode). This is the data that is read from the device (MSb first).
The multiple read command is available in 3-wire mode.
Magnetometer SPI write
Figure 12. Magnetometer SPI write protocol
CS
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
AM10132V1
The SPI Write command is performed with 16 clock pulses. The 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 13. Multiple byte SPI write protocol (2-byte example)
CS
SPC
SDI
RW
DI7 D I6 DI5 D I4 DI3 DI2 DI1 DI0 DI15 D I1 4DI13 D I1 2DI11 DI10 DI9 DI8
MS _{AD5 AD4 AD3 AD2 AD1 AD 0}
AM10133V1
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