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LIS2MDL датащи(PDF) 25 Page - STMicroelectronics

номер детали LIS2MDL
подробное описание детали  Digital output magnetic sensor: ultra-low-power, high-performance 3-axis magnetometer
PDF  41 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LIS2MDL датащи(HTML) 25 Page - STMicroelectronics

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LIS2MDL
Digital interfaces
41
6.2
SPI bus interface
The LIS2MDL SPI is a bus slave. The SPI allows writing and reading the registers of the
device.
The default serial interface interacts with the application using 3 wires: CS, SPC, SDI/O.
The 4-wire SPI interface mode can be activated by writing bit 2 of CFG_REG_C (62h) to 1.
Of course, doing this disables the interrupt and data-ready signaling capability of the device.
6.2.1
SPI write
Figure 6. SPI write protocol
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 1-7: address AD(6:0). 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 7. Multiple byte SPI write protocol (2-byte example)
CS
SPC
SDI
RW
D I7D I6
D I5D I4
DI3DI2
DI1DI0
AD5 AD 4 AD 3 AD2 AD 1 AD0
AD6
CS
SPC
SDI
RW
AD5 AD4 AD3 AD2 AD1 AD 0
DI7 D I6 DI5 D I4 DI3 DI2 DI1 DI0 DI15 D I1 4 DI13 D I1 2 DI11 DI10 DI9 DI8
AD6



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