Datasheet

BMM150 Geomagnetic Sensor

Page 36

BST-BMM150-DS001-05 | Revision 1.4 | April 2020

Bosch Sensortec

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Note: Specifications within this document are subject to change without notice.

CSB

SCK

SDI

RW

AD6 AD5 AD4 AD3 AD2 AD1 AD0

DI5

DI4

DI3

DI2

DI1

DI0

DI7

DI6

Figure 12: 3-wire basic SPI read or write sequence (mode “11”)

6.2 Inter-Integrated Circuit (I²C)

The I²C bus uses SCL (= SCK pin, serial clock) and SDA (= SDI pin, serial data input and output)

signal lines. Both lines are connected to VDDIO externally via pull-up resistors so that they are

pulled high when the bus is free.

The I²C interface of the BMM150 is compatible with the I²C Specification UM10204 Rev. 03 (19

June 2007), available at http://www.nxp.com. The BMM150 supports I²C standard mode and fast

mode, only 7-bit address mode is supported.

The default I²C address of the BMM150 is 0x10. The five MSB are hardwired to “00100”. In order

to prevent bus conflicts bit0 can be inverted by setting ‘1’ to SDO, and the bit 1 can be inverted

by setting ‘1’ to the CSB line according to below Table:

Table 30: BMM150 I²C addresses

CSB pin

SDO pin

I²C address

GND

GND

0x10

GND

VDDIO

0x11

VDDIO

GND

0x12

VDDIO

VDDIO

0x13