Freescale Semiconductor KIT33908MBEVBE Bedienungsanleitung

Freescale Semiconductor, Inc.

User’s Guide

Document Number: KT33908MBUG

Rev. 1.0, 3/2014

KIT33908MBEVBE Evaluation Mother Board

Featuring the MC33908 Safe System Basis Chip with Buck and Boost DC/DC up to 1.5 A

Figure 1. KIT33908MBEVBE Evaluation Board

Contents

1 Kit Contents/Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2 Jump Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

3 Important Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

4 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

5 Evaluation Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

6 MC33908 Device Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

7 Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

8 Evaluation Board Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

9 Setting Up and Using the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

10 Evaluation Board Hardware Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

11 Power Supply Scheme when Using Daughterboard MPC5643L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

12 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

13 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

14 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

15 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

16 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Kit Contents/Packing List

KIT33908MBEVBE Evaluation Board User’s Guide , Rev. 1.0 3/2014

2Freescale Semiconductor, Inc.

1 Kit Contents/Packing List

• Assembled and tested evaluation board/module in anti-static bag. The board is preloaded with demo

software

• Warranty card

2JumpStart

•Gotowww.freescale.com/analogtools

•Locate your kit

• Review your Tool Summary Page

• Look for

• Download documents, software, and other information

Jump Start Your Design

Important Notice

KIT33908MBEVBE Evaluation Board User’s Guide, Rev. 1.0 3/2014

Freescale Semiconductor, Inc. 3

3 Important Notice

Freescale provides the enclosed product(s) under the following conditions:

This evaluation kit is intended for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES

ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs,

outputs, and supply terminals. This evaluation board may be used with any development system or other

source of I/O signals by simply connecting it to the host MCU or computer board via off-the-shelf cables. This

evaluation board is not a Reference Design and is not intended to represent a final design recommendation

for any particular application. Final device in an application will be heavily dependent on proper printed circuit

board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O

signal quality.

The goods provided may not be complete in terms of required design, marketing, and or manufacturing related

protective considerations, including product safety measures typically found in the end product incorporating

the goods. Due to the open construction of the product, it is the user's responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. In order to minimize risks associated with the

customers applications, adequate design and operating safeguards must be provided by the customer to

minimize inherent or procedural hazards. For any safety concerns, contact Freescale sales and technical

support services.

Should this evaluation kit not meet the specifications indicated in the kit, it may be returned within 30 days from

the date of delivery and will be replaced by a new kit.

Freescale reserves the right to make changes without further notice to any products herein. Freescale makes

no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor

does Freescale assume any liability arising out of the application or use of any product or circuit, and

specifically disclaims any and all liability, including without limitation consequential or incidental damages.

“Typical” parameters can and do vary in different applications and actual performance may vary over time. All

operating parameters, including “Typical”, must be validated for each customer application by customer’s

technical experts.

Freescale does not convey any license under its patent rights nor the rights of others. Freescale products are

not designed, intended, or authorized for use as components in systems intended for surgical implant into the

body, or other applications intended to support or sustain life, or for any other application in which the failure

of the Freescale product could create a situation where personal injury or death may occur.

Should the Buyer purchase or use Freescale products for any such unintended or unauthorized application,

the Buyer shall indemnify and hold Freescale and its officers, employees, subsidiaries, affiliates, and

distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising

out of, directly or indirectly, any claim of personal injury or death associated with such unintended or

unauthorized use, even if such claim alleges that Freescale was negligent regarding the design or manufacture

of the part.Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other

product or service names are the property of their respective owners.

Introduction

KIT33908MBEVBE Evaluation Board User’s Guide , Rev. 1.0 3/2014

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4 Introduction

The KIT33908MBEVBE evaluation mother board demonstrates the functionality of the MC33908 power system

basis chip. This SMARTMOS IC is equipped with an Intelligent Power Management System including safety

features targeting the latest ISO26262 automotive functional safety standard. The power management and

MCU peripherals are located on the motherboard described in this user guide. The motherboard can be used

with different daughter boards. The daughter board is selected according to the preferred MCU along with its

associated circuitry. The enhanced evaluation board system includes demonstration software, which facilitates

communication between the motherboard’s power management functions and daughter board’s MCU. The

system’s advanced safety features enable it to reach the highest standard in functional safety: ASILD.

5 Evaluation Board Features

• Unique modular platform enables evaluation of different microcontrollers using the KIT33908MBEVBE and

daughter board

• Switching mode power supply (SMPS) dedicated to MCU core supply: 1.2 V and 3.3 V, selectable through

an external voltage, selectable through external jumpers

• Linear voltage regulator dedicated to MCU A/D reference voltage or I/Os supply (VCCA). 5.0 V or 3.3 V

• Linear voltage regulator dedicated to auxiliary functions or to a sensor supply (VCCA tracker or independent

5.0 V/3.3 V)

• Highly flexible SMPS pre-regulator, allowing two topologies: Non-inverting buck-boost or standard buck

• Multiple wake-up sources in low-power mode: CAN Interface, local wake pins

• Battery voltage sensing before reverse battery protection

• Enhanced safety block associated with fail-safe outputs (two active-low signals)

• SPI interface connectivity

• Configurable digital I/Os through SPI registers

• MUX output terminal for the device’s internal analog signal and power supply monitoring

• SO11898 high-speed CAN interface compatibility for baud rates of 40 kB/s to 1.0 MB/s

• High EMC immunity and ESD robustness

MC33908 Device Features

KIT33908MBEVBE Evaluation Board User’s Guide, Rev. 1.0 3/2014

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6 MC33908 Device Features

The MC33908 is a multi-output IC, with power supply and HSCAN transceiver. This device is designed

specifically with the automotive market in mind. It supports the following functions:

• Highly flexible SMPS pre-regulator, allowing two topologies: non-inverting buck-boost or standard buck

• Switching mode power supply (SMPS) dedicated to MCU core supply: 1.2 V or 3.3 V, delivering up to 1.5 A

• Linear voltage regulator dedicated to MCU A/D reference voltage or I/Os supply (VCCA): 5.0 V or 3.3 V

• Linear voltage regulator dedicated to auxiliary functions or to a sensor supply (VCCA tracker or independent

5.0 V/3.3 V)

• Multiple wake-up sources in low-power mode: CAN and/or IOs

• Battery voltage sensing and multiplexer output terminal (various signal monitoring)

• Enhanced safety block associated with fail-safe outputs

• Six configurable I/Os

• ISO11898 high-speed CAN interface compatibility for baud rates of 40 kB/s to 1.0 MB/s

• High EMC immunity & ESD robustness

7 Required Equipment

• Power supply

• Oscilloscope (preferably four-channel) with current probe

• Digital multimeter

• USB-enabled PC with Windows XP or higher

• MCU daughter board

Important notice:

The mother board (KIT33908MBEVBE) is extensible by the daughter board (KITMPC5643DBEVM) and cannot

operate separately. The equipment list is considered for operation with the KITMPC5643DBEVM uniquely. Two

modes of operation with this platform can be distinguished:

Recommended equipment for software development:

• Power supply 12 V/3.0 A

• USB A-B cable

• P&E USB Multi-link Debugger

• USB-enabled PC

Recommended equipment for hardware development (validation of analog functionality etc.):

• Power supply: typically 12 V/3.0 A

• USB A-B cable

• USB-enabled PC

Recommended software:

• Windows 7 32-bit operating system

• MC33907_8 Graphical User Interface

(http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KIT33907AEEVB&fpsp=1&tab=Desi

gn_Tools_Tab)

• CodeWarrior IDE for Qorivva MCU family installed

(http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=CW-MPC55XX_56XX&fsrch=1)

Evaluation Board Configuration

KIT33908MBEVBE Evaluation Board User’s Guide , Rev. 1.0 3/2014

6Freescale Semiconductor, Inc.

8 Evaluation Board Configuration

8.1 Evaluation Board Configuration for Software Development

Figure 2. KIT33908MBEVBE Board Setup for Software Development

Power Supply

P&E Multilink

KITMPC5643DBEVM

Personal Computer

Universal Debugger

Cable

USB A-B

KIT33908MBEVBE

Evaluation Board Configuration

KIT33908MBEVBE Evaluation Board User’s Guide, Rev. 1.0 3/2014

Freescale Semiconductor, Inc. 7

8.2 Evaluation Board Configuration for Hardware Development

Figure 3. KIT33908MBEVBE Board Setup For Hardware Development

Cable

USB A-B

Personal Computer

KIT33908MBEVBE

KITMPC5643DBEVM

Power Supply

Setting Up and Using the Hardware

KIT33908MBEVBE Evaluation Board User’s Guide , Rev. 1.0 3/2014

8Freescale Semiconductor, Inc.

9 Setting Up and Using the Hardware

In order to perform the demonstration examples, first set up the evaluation board hardware and software as

follows:

1. Install the MC33907_8 graphical user interface

2. Plug the daughter board onto the mother board platform (KIT33908MBEVBE)

3. Connect the power supply to the mother board and switch it on (verify the power supply’s polarity)

4. Connect the mother board to the PC using USB A-B cable

5. Wait for the driver installation (after the first connection, drivers for the device have to be installed. This can

take several minutes. When finished, a status message will be displayed)

6. Launch the MC33907_8 graphical user interface

7. Select the EVM button on the welcome screen to choose the enhanced evaluation board option

8. Switch to the “Read registers 5” where you should see an on-going watchdog refresh (bits of the

WD_LFSR register will be blinking)

10 Evaluation Board Hardware Description

From the functional point of view, the KIT33908MBEVBEE motherboard can be separated into two different

sections: analog and digital. The analog part consists of the MC33908 chip and its associated circuitry. The

digital part consists of the MCU peripherals.

Figure 4. The KIT33908MBEVBEE Enhanced Evaluation Board

Evaluation Board Hardware Description

KIT33908MBEVBE Evaluation Board User’s Guide, Rev. 1.0 3/2014

Freescale Semiconductor, Inc. 9

10.1 The Analog Section

10.1.1 Overview

Figure 5. Power Management Section

10.1.2 VCORE Output Capacitance (JP126)

Output capacitance has an impact on the feedback (FB_core), which is necessary for controlling the VCORE

voltage through a compensation network. For test purposes on the EVM, two different capacities are selectable

due to the jumper JP126 (if the jumper is disconnected, output capacitance is set to 20 µF, otherwise to 40 µF),

see Jumper Definitions. These capacities simulate capacity of the real circuitry normally connected to VCORE.

Changing the output capacitance has an impact on a selection of the compensation network.

10.1.3 Compensation Network (JP115 &JP117)

The voltage regulator needs feedback from the VCORE voltage to be able to adjust (control) output voltage. For

this reason, a compenstation network is implemented in the external MC33908 circuitry. Static feedback

(steady-state) voltage is defined by a simple resistor bridge (given by R119/R121 and R133). Dynamic behavior

of the regulator is controlled by an RC network (defined by R124, R126, C127, C130, R135, R136, C128, C129).

Compensation network is shown on the Figure 6. Steady-state voltage can be chosen (either 1.23 or 3.3 V). To

tune the dynamic performance, the board is equipped with two different networks (possible combinations of the

jumpers JP115 and JP117 are shown in the Table 1). The combinations shown in Table 1 were chosen for an

optimal performance for the given output voltage. The real dynamic performance can differ for different

applications, and can be tuned by changing the compensation network, and by adding output capacitors

(JP126).

Evaluation Board Hardware Description

KIT33908MBEVBE Evaluation Board User’s Guide , Rev. 1.0 3/2014

10 Freescale Semiconductor, Inc.

Figure 6. Compensation Network and VCORE Setting Scheme

Table 1. Compensation Network and VCORE Setting

VCORE (V)

Jumper Settings

Static Behavior Dynamic Behavior

JP115 JP114 JP117

1.23 3 - 4 3 - 4 3 - 4

3.3 1 - 2 1 - 2 1 - 2

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