LIS3MDL datasheet(20/33 Pages) STMICROELECTRONICS

Part #	LIS3MDL

Description	Digital output magnetic sensor: ultra-low-power, high-performance 3-axis magnetometer

PDF	33 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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20 / 33 page

Digital interfaces

LIS3MDL

20/33

DocID024204 Rev 4

5.2.1

SPI read

Figure 7. SPI read protocol

The SPI read command is performed with 16 clock pulses. A multiple byte read command is

performed by adding blocks of 8 clock pulses to the previous one.

bit 0: READ bit. The value is 1.

bit 1: MS bit. When 0, does not increment address; when 1, 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).

bit 16-... : data DO(...-8). Further data in multiple byte reads.

Figure 8. Multiple byte SPI read protocol (2-byte example)

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AM10130V1

SPC

SDI

SD O

DO 7 DO6 DO 5 DO4 DO 3 DO2 DO 1 DO0

A D5 A D4 AD 3 A D2 A D1 A D0

DO 15 DO 14 DO 13 DO 12 DO 11 DO 10 D O9 D O8

AM10131V1

LIS3MDL Datasheet(PDF) 20 Page - STMicroelectronics