Rohm BD63800MUF-EVK-002 User manual

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
Automotive Power and Motor Drive
Evaluation Kit for Stepping Motor Driver
BD63800MUF-EVK-002
The ROHM BD63800MUF-C is an AEC-Q100 automotive qualified bipolar low-consumption stepping motor driver that is driven by
PWM current. It is suitable for Automotive applications such as Head-up Display, LED Headlight, Heat pump and Intake Air Control
Valve. This EVK enables the performance evaluation of this IC in research and development laboratories.
● Description
BD63800MUF-EVK-002 is an evaluation board for the
Automotive Stepping Motor Driver IC. Also, a GUI can be
provided by ROHM for easy SPI register configuration.
The key component of the evaluation board is the ROHM
BD63800MUF-C which have the following specifications and
features:
● BD63800MUF-C Key Specifications:
➢ Supply voltage range…………………….…6.0 to 28 V
➢ Output Current Rating (peak) …..………………1.35 A
➢ Output Current Rating (DC) …..………….........1.20 A
➢ Output On Resistance (up and down) .............0.75 Ω
➢ VCC quiescent supply current (max) …………..10 µA
BD63800MUF-C operates with single power supply which can
simplify the set design.
● BD63800MUF-C Features:
➢ CLK-IN and SPI-IN Drive mode
➢ Supported Modes:
Full step, 1/2, 1/4, 1/8, 1/16 and 1/32 step
➢ Current Decay Mode Switch Function
- Mix Decay: Linear Adjustment of
Slow Decay / Fast Decay Ratio
- Auto Decay: Automatic Switch of
Slow Decay / Fast Decay
Further features and protections are referred to the datasheet.
Figure 1: BD63800MUF-EVK-002
● EVK Features
➢ Plug & Play Stepping Motor Evaluation Kit
➢ Graphical User Interface application software
Easy to set/read register.
[Operating System: Windows10]
➢ External Switches for pin setting.
Open or High settings
➢ Test pins for easy signal monitoring

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
Contents
1Introduction ................................................................................................................................................. 3
2Safety Instructions ........................................................................................................................................ 4
2.1 Warnings .............................................................................................................................................. 4
2.2 Instructions for Safe Use........................................................................................................................... 4
3Hardware Description .................................................................................................................................... 5
3.1 Schematic ............................................................................................................................................. 5
3.2 PCB Layout and Component Placement ....................................................................................................... 6
3.3 Bill of Materials....................................................................................................................................... 9
4Operating Instructions .................................................................................................................................. 10
4.1 Hardware............................................................................................................................................ 10
4.2 Software ............................................................................................................................................. 12

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
1 Introduction
This evaluation kit (EVK) manual describes the usage of ROHM’s BD63800MUF-EVK-002. The purpose of the EVK is to allow the
test and evaluation of the stepping motor driver IC BD63800MUF-C in professional research and development environments. This
document provides guidelines to quickly setup the hardware and software for fast and easy stepping motor driver IC performance
evaluation.
• BD63800MUF-C evaluation board [BD63800MUF-EVK-002]
• USB cable (USB2.0 A-Male to C-Male)
• BD63800MUF-C GUI control software (MS Windows)
• USB Driver
For operation of the EVK the following additional items will be required:
• PC with operating system Windows 10 or higher
• Laboratory DC power supplies: 12 V(typ.)/1.5 A(min.) and 5 V/100 mA(min.)
• Load (e.g. Bipolar DC step motor)
• Connecting cables between DC power supply and boards
• Clock generator: Input 5 V to 0 V clock signal for CLK pin. [Optional]
Figure 2 shows the setup boards and instruments as mentioned above. Detailed information for connection is described on section
4.1[Hardware]. For receiving the BD63800MUF-C GUI control software please get in touch with your local ROHM sales office or use
the general ROHM customer support system.
Figure 2: BD63800MUF-EVK-002 Evaluation Setup.
USB Cable
(A-male to C-male)

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
2 Safety Instructions
2.1 Warnings
▪ This evaluation kit must only be operated by trained professionals.
▪ This evaluation kit should be operated in a well ventilated environment and, if used inside a case, the case should not
be covered.
▪ This evaluation kit should be placed on a stable, flat, non-conductive surface in use and should not be contacted by
conductive items.
▪ All peripherals used with the evaluation kit should comply with relevant standards for the country of use and be marked
accordingly to ensure that safety and performance requirements are met.
▪ Where peripherals are connected that do not include the cable or connector, the cable or connector used must offer
adequate insulation and operation in order that the requirements of the relevant performance and safety are met.
▪ The connection of incompatible devices to the evaluation kit may affect compliance or result in damage to the unit and
invalidate the warranty.
2.2 Instructions for Safe Use
▪ Do not expose the evaluation kit to water, moisture or place on a conductive surface whilst in operation.
▪ Take care whilst handling to avoid mechanical or electrical damage to the printed circuit board and components.
▪ Avoid handling the printed circuit board while it is powered. Only handle by the edges to minimize the risk of
electrostatic discharge damage.
▪ Do not short any outputs to each other, to the supply or to GND.
▪ Do not operate the evaluation kit outside its specified ratings.
▪ Take care to monitor the PCB and IC temperatures in particular when operating with high power loads and do not
exceed the absolute maximum ratings of all components.

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
3 Hardware Description
3.1 Schematic
Figure 3: Evaluation Board Schematic

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
3.2 PCB Layout and Component Placement
Please note that the layout of this EVK is not optimized in terms of thermal performance or signal routing.
The focus is more on enabling easy test by adding test points to each signal. All pictures are viewed as seen from TOP side.
Figure 4: TOP side PCB with Pads and Silkscreen
Figure 5: Bottom side with Pads and Silkscreen

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
Figure 6: Top layer
Figure 7: 2nd layer

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
Figure 8: 3rd layer
Figure 9: Bottom layer

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
3.3 Bill of Materials
Comp. Name
Value
Type
Quantity
For BD63800MUF-C
C0
1 nF
Capacitor, Surface Mount/Through Hole
1
C1
100 µF
Capacitor, Through Hole
1
C2
100 nF
Capacitor, Surface Mount/Through Hole
1
C3
0.1 µF
Capacitor, Surface Mount/Through Hole
1
CN1
1 row x 4 pin Connector
2.54mm pitch, 1.0mm Hole
1
R0
39 kΩ
Resistor, Surface Mount
1
R1
6.2 kΩ
Resistor, Surface Mount
1
R4, R5
10 kΩ
Resistor, Surface Mount/Through Hole
2
R2, R3
Open
Resistor, Surface Mount
2
S1, S2, S3, S4, S5,
S6, S7, S8, S9
SPDT switch
2.54mm pitch, 1.0mm Hole
9
U1
BD63800MUF-C
IC for Stepper Motor Driver
VQFN32FBV050
1
For Microcontroller
C4, C5, C7, C8, C9, C10,
C11, C12, C13, C17, C18,
C20
0.1 µF
Capacitor, Surface Mount
12
C6
10 µF
Capacitor, Surface Mount
1
C14, C15
22 pF
Capacitor, Surface Mount
2
C16, C22
1 µF
Capacitor, Surface Mount
2
C19, C21
2.2 µF
Capacitor, Surface Mount
2
C23
10 µF
Capacitor, Surface Mount
1
CN2
2 row x 10 pin Connector
2.54mm pitch, 1.0mm Hole
1
D1, D2, D3
7.5V
Zener diode, Surface Mount
3
L1, L2
31 Ω
Ferrite bead, Surface Mount
2
R10, R13, R14
10 kΩ
Resistor, Surface Mount
3
R6, R8, R9, R11, R12
100 kΩ
Resistor, Surface Mount
5
R15, R16, R17, R18, R19,
R20, R21, R22
22 Ω
Resistor, Surface Mount
8
U2
CY7C68013A-56PVXC
IC MCU USB PERIPH HI SPD 56SSOP
1
U3
24LC64F-I/SN
IC EEPROM 64KBIT I2C 8SOIC
1
U4
74LVC4T3144PW-Q10J
IC BUF NON-INVERT 5.5V
14TSSOPLINEAR 3.3V 500MA 8SOIC
1
U5
TPS77533D
IC REG LINEAR 3.3V 500MA 8SOIC
1
X1
ECS-240-20-23A-EN-TR
CRYSTAL 24.0000MHZ 20PF SMD
1
Table 1: Evaluation Board Bill of Materials

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© 2021 ROHM Co., Ltd.
No. 63UG134E Rev.002
January.2022
User’s Guide
BD63800MUF-EVK-002
4 Operating Instructions
4.1 Hardware
Before start to connect, make sure to turn off all equipment for your safety.
Connect the cables as followings:
[BD63800MUF-EVK-002]
1. Connect USB Cable(C-Male) to CN2.
2. Connect DC Power Supply [6 to 28 V / 1.5 A (min.)] to VCC(Red) and GND(Black) terminal.
3. Connect Load to Outputs (OUT1A, OUT1B, OUT2A, OUT2B).
To make sure the correct connection, please check the install manual of the load.
4. Connect Clock Signal Generator to CLK terminal. [Option: In case of use the CLK terminal]
DC Power Supply
6 to 28V
Clock Signal Generator
0V(Low) –5V(High)
BD63800MUF-EVK-002
CN2 USB Cable
A-Male to C-Male
Load
Bipolar DC Step Motor
CLK
OUT1A
OUT1B
OUT2B
OUT2A S9
to
S1
Vcc GND
Output
Vcc GND
Figure 10: BD63800MUF-EVK-002 Setup