BMF055 datasheet(13/22 Pages) BOSCH

13 / 22 page

BMF055

Data sheet

Page 13

BST-BMF055-DS000-01 | R evision 0.1 | N ovem ber 2015

Bosch Sensortec

to third parties. BOSCH and the symbol are registered tradem arks of Robert Bosch GmbH, Germany.

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

3. Functional Description

3.1 Architecture

The following figure shows the basic building blocks of the BMF055 device.

Figure 1: system architecture

3.2 Power management

The BMF055 has two distinct power supply pins:

• VDD is the main power supply for the internal sensors

• VDDIO is a separate power supply pin used for the supply of the µC and the digital interfaces

For the switching sequence of power supply VDD and VDDIO it is mandatory that VDD is powered

on and driven to the specified level before or at the same time as VDDIO is powered ON.

Otherwise there are no limitations on the voltage levels of both pins relative to each other, as

long as they are used within the specified operating range.

When the VDDIO supply is switched off, all interface pins (CSB, MOSI, MISO, SCLK) must be

kept close to GNDIOpotential.

BMF055 Datasheet(PDF) 13 Page - Bosch Sensortec GmbH