Rohm RKX-EVK-001 User manual

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© 2022 ROHM Co., Ltd.
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User’s Guide
RKX-EVK-001 and ROHM EVK EVB
ROHM EVK HW User’s Guide
The ROHM EVK is an easy-to-use platform that allows evaluation of ROHM products. The evaluation kit is based on the Infineon CY8CKIT-059
Prototyping Kit featuring an integrated SoC based on the ARM® Cortex®-M3 CPU with powerful analog and digital peripherals. The ROHM EVK
comes with a highly configurable RKX-A3-EVK-001 that provides an easy-to-use hardware interface between the MCU and the variety of Digital
ROHM devices in a plug-and-play fashion. Finally, the ROHM EVK GUI SW, a powerful Windows-based desktop application, provides an intuitive
Graphical User Interface capable of displaying and logging the real-time device data, and configuring the device functions through a graphical
register editor, to name a few.
This user guide describes the ROHM EVK HW. For the ROHM EVK SW, please refer to the ROHM EVK SW User’s Guide.
Definitions
ROHM EVK
Provides the full range of software, hardware and the firmware used for device evaluation purposes.
ROHM EVK HW
ROHM EVK EVB connected to RKX-EVK-001 board
RKX-EVK-001
RKX-A3-EVK-001 + CY8CKIT-059 Prototyping Kit
RKX-A3- EVK-001
Adapter board specifically designed to easily interface with the ROHM EVK Evaluation Board and
development platforms
ROHM EVK EVB
Accelerometer evaluation board or ADC evaluation board
Accelerometer EVB
Evaluation board with an accelerometer
ADC EVB
Evaluation board with an ADC
ROHM EVK SW
Provides the full range of the software for device evaluation purposes consisting of ROHM EVK GUI
SW and RKX EVK FW
ROHM EVK GUI SW
ROHM device evaluation software with a graphical user interface running on Windows OS
ROHM EVK FW
Proprietary firmware running on microcontroller-based host adapters
Acronyms
ADC
A/D Converter
GUI
Graphical User Interface
PSoC
Programmable SoC (System on Chip)

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User’s Guide
TABLE OF CONTENTS
Definitions..................................................................................................................................................................................................................................................................1
Acronyms.................................................................................................................................................................................................................................................................1
1ROHM EVK HW Overview...................................................................................................................................................................................................................3
ROHM EVK HW Contents......................................................................................................................................................................3
System Level Block Diagram..................................................................................................................................................................3
RKX-A3-EVK-001 ...................................................................................................................................................................................4
1.3.1 RKX-A3-EVK-001 Detailed Diagram..................................................................................................................................................4
1.3.2 Input / Output Power Configuration.....................................................................................................................................................5
1.3.3 VDD_SENSOR Current Measurements............................................................................................................................................8
1.3.4 IO_VDD Voltage Level Shifters...........................................................................................................................................................8
2Interface with Evaluation Boards............................................................................................................................................................................................................9
Physical Interfacing with ROHM EVK EVB ............................................................................................................................................9
3Interface with host platforms.................................................................................................................................................................................................................10
Infineon CY8CKIT-059 Prototyping Kit..................................................................................................................................................11
3.1.1 Overview ...........................................................................................................................................................................................11
3.1.2 Firmware Pinout................................................................................................................................................................................13
4About RKX-A3-EVK-001......................................................................................................................................................................................................................14
Board Information................................................................................................................................................................................. 14
Schematic Diagram.............................................................................................................................................................................. 14
Bill of Materials...................................................................................................................................................................................... 17
Layout (Top View)................................................................................................................................................................................. 18
5Troubleshooting and known issues.....................................................................................................................................................................................................19
Communication Troubleshooting......................................................................................................................................................... 19
5.1.1 RKX-EVK-001 Communication Issues.............................................................................................................................................19
5.1.2 USB performance issues..................................................................................................................................................................22
“EVK Mismatch” – state with the ROHM EVK GUI SW...................................................................................................................... 22
ODR accuracy and Timestamping....................................................................................................................................................... 22
.NET installation related problem ......................................................................................................................................................... 22
Desktop shortcuts may not work properly............................................................................................................................................ 23

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User’s Guide
1 ROHM EVK HW Overview
ROHM EVK HW Contents
The RKX-EVK-001 sales package comes with the RKX-EVK-001, one micro-USB cable (3.3’), and one 14-position ribbon cable (1.5’) by default.
(Figure 1)
The RKX-EVK-001 is designed to work seamlessly with the Accelerometer EVB (e. g. KX132-1211-EVK-001) and ADC EVB (BU79100G-LA-
EVK-001) that can be purchased separately. (Figure 2)
Figure 1. RKX-EVK-001 sales package
Figure 2. Accelerometer EVB and ADC EVB
System Level Block Diagram
The main components of the RKX- EVK-001 are the host platform (Infineon CY8CKIT-059) and the RKX-A3-EVK-001. The RKX- EVK-001 is
designed to be interfaced seamlessly with the Accelerometer EVB and ADC EVB that can be purchased separately. The main purpose of the
RKX-A3-EVK-001 is to provide a hardware interface between the host platform and the evaluation board. The Figure 3 shows the simplified high-
level block diagram of the RKX-EVK-001.

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User’s Guide
Figure 3. High Level Block Diagram of the RKX-EVK-001
RKX-A3-EVK-001
1.3.1 RKX-A3-EVK-001 Detailed Diagram
The RKX-A3-EVK-001 is designed to easily interface with ROHM products and numerous development platforms. By default, the board is
populated to interface with the Infineon CY8CKIT-059 PSoC® prototyping platform and with ROHM standard evaluation boards featuring a 14-pin
male header. However, with some hardware modifications, the board can also support additional host platforms such as the Arduino UNO R3 ,
and Raspberry Pi, and additional evaluation boards like the ROHM Sensor Shield Modules 5-pin digital or 4-pin analog boards. The Figure 4 and
Table 1 show the main component of the RKX-A3-EVK-001.
Figure 4. RKX-A3-EVK-001 Main Features

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User’s Guide
Table 1. RKX-A3-EVK-001 Main Features
1.3.2 Input / Output Power Configuration
1.3.2.1 VDD_SENSOR Select
The RKX-A3-EVK-001 gives users the flexibility to test sensors at different VDD and IO_VDD input voltages as well as providing a way to interface
sensors with both 5V platforms (e.g., Arduino UNO R3, or Infineon CY8CKIT-059) and 3.3V platforms (e.g., Raspberry Pi).
The VDD Sensor Select circuitry is shown in Figure 5. When the RKX-A3-EVK-001 is connected to a host platform, the input voltage to the board
is supplied on VBUS net and the green LED (LED1) will be ON. The VBUS voltage is then supplied as an input to the Voltage Regulator (VR1)
and is connected to the Single Poll Double Throw (SPDT) switch SW1. The purpose of the SW1 is to select the VDD voltage to the sensor that
will be connected to the RKX-A3-EVK-001 (VDD_SENSOR). One option for the VDD_SENSOR is the actual VBUS voltage. The second option
is the output voltage from the VR1 voltage regulator (VR1_OUT). The default configuration of the RKX-A3-EVK-001 is to select the output voltage
from the VR1 voltage regulator.
NOTE: Care must be taken when switch SW1 is moved left to select VBUS voltage. For platforms like CY8CKIT-059 Prototyping Kit and Arduino
UNO R3, the VBUS voltage can be as high as 5V. Since many sensors including KX132-1211, are rated to 3.6V VDD max, overvoltage and
potential permanent damage may be done in cases when the 5V VBUS voltage is connected to VDD_SENSOR.
1
TP4 - Test Point 4 for VBUS (Host) input voltage measurement
12
TP1 - Test Point 1 for GND reference voltage measurements
2
LED2 - Orange LED is ON when VDD_SENSOR voltage is ON
13
J9 - Raspberry Pi 6-pin debug header
3
SW4 - Switch that connects VDD_SENSOR to VBUS/VR1_OUT
14
J8 - Raspberry Pi 40-pin dual-row header
4
LED1 - Green LED is ON when VBUS (Host) Voltage is provided
15
J15 - Infineon CY8CKIT-059 compatible header
5
SW1 - VDD_SENSOR select switch (VBUS or VR1_OUT)
16
J14 - Infineon CY8CKIT-059 compatible header
6.
J7 / R64 - VDD_Sensor current measurement header/bypass.
17
J4 - Arduino UNO R3 Compatible Digital Header (bottom mount)
7
SW3 - IO_VDD Select switch (VDD_SENSOR of VR2_OUT)
18
J6 - ROHM EVK EVB compatible header
8
SW2 - 7-position rotary switch to configure VR1_OUT voltage:
1 = 3.3V, 2 = 3.0V, 3 = 2.8V, 4 = 2.5V, 5 = 1.8V, 6 = 1.7V, 7 = 3.6V
19
J10 - ROHM Sensor Module 5-Pin Digital / 4-Pin Analog Header
9
TP3 - Test Point 3 for VDD_SENSOR voltage measurement.
20
J3 – Arduino UNO R3 Compatible Digital Header (bottom mount)
10
J1 - Arduino UNO R3 Compatible Power Header (bottom mount)
21
J11 - ROHM 7-Pin Digital Sensor (SPI) Header
11
J2 - Arduino UNO R3 Compatible Analog Header (bottom mount, even-
numbered pins).
22
J5 - ROHM EVK EVB ribbon cable compatible header

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Figure 5. RKX-A3-EVK-001 VDD Sensor Select
The VR1 voltage regulator is a variable output Low Dropout (LDO) linear voltage regulator. The output voltage of the VR1 is selected via rotary
switch SW2. The SW2 switch has 7 positions as indicated on the schematic and on the printed circuit board itself. The switch SW2 can be rotated
with a small flat screwdriver. By default, the RKX-A3-EVK-001 is shipped with switch SW2 in Position 1. See Table 2 for details on how to select
the output voltage using SW2.
Table 2. Switch SW2 Voltage Select for different Switch Positions
SW2 position
1
2
3
4
5
6
7
VR1_OUT
3.3V
(default)
3.0V
2.8V
2.5V
1.8V
1.7V
3.6V
Following the voltage path from VBUS to the switch SW1 (from left-to-right in Figure 5), next comes switch SW4 (VDD_SENSOR ON/OFF switch).
The purpose of the switch SW4 is to disconnect the VDD_SENSOR from the input voltage (VBUS). This can be useful when an evaluation board
needs to be unplugged and re-plugged again. By default, the switch SW4 is on the ON position (UP position when looked from above). When the
RKX-A3-EVK-001 is connected to a host platform, and the switch SW4 is turned ON, the orange LED (LED2) will be ON. If the switch SW1 is
connected to the output of the VR1 voltage regulator (VR1_OUT), the brightness of the orange LED will be proportional to the VR1_OUT voltage
output. At default position of the switch SW2 (3.3V) the LED light will be bright and when the output voltage is selected to 1.8V or 1.7V using the
switch SW2, the LED2 light will be dim. If the orange LED (LED2) is completely OFF and the green led (LED1) is ON, please ensure the switch
SW2 is not turned to an intermediate position and is at one of the 7 positions shown in Table 2.

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1.3.2.2 IO_VDD Sensor Select and VR2 Voltage Regulator
The RKX-A3-EVK-001 provides flexibility for selecting the IO_VDD source for the connected sensors independent of the VDD_SENSOR if desired.
As shown in Figure 6, the selection is made using the Single Poll Double Throw (SPDT) switch SW3. The default option for IO_VDD is to be
connected to the VDD_SENSOR rail. In this case, the IO_VDD voltage will follow the VDD_SENSOR voltage. The alternative selection of the
SW3 switch would connect IO_VDD rail to the output of the VR2 voltage regulator.
Figure 6. IO_VDD Sensor Select and VR2 Voltage Regulator
The VR2 voltage regulator is also a variable output Low Dropout (LDO) linear voltage regulator. By default, it is configured to output 3.3V using the
preset values of R5 and R6 feedback resistors. However, the user can modify the output of the VR2 voltage regulator if desired by replacing the
R6 resistor (13.7k) with another value (Table 3).
Table 3. Voltage Regulator (VR2) Output Option
VR2_OUT
3.3V (default)
3.0V
2.8V
2.5V
1.8V
1.7V
3.6V
R6
13.7k
15.4k
17.4k
20k
34k
38.3k
12.4k
R5
43.2k
43.2k
43.2k
43.2k
43.2k
43.2k
43.2k
1.3.2.3 External Power Supply Connection
In some cases, it may be required to provide an external voltage source for the VDD_SENSOR. To accomplish this, please remove the R64 zero-
ohm resistor. The positive terminal of the external power supply can then be attached to the test point TP3 and negative terminal can be attached
to any GND location on the RKX-A3-EVK-001. One such convenient location is a test point TP1 shown in Figure 7.
Figure 7. External Voltage Source Recommended Connection

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1.3.3 VDD_SENSOR Current Measurements
The RKX-A3-EVK-001 provides a convenient way to measure the current supplied on the VDD_SENSOR power rail for testing and evaluation
purposes. In order to measure the VDD_SENSOR current, it is recommended to remove the R64 zero-ohm resistor and to connect a current
meter across the J2 header that can be optionally populated for such a test.
Figure 8. VDD_SENSOR Current Measurement Recommended Connections
1.3.4 IO_VDD Voltage Level Shifters
The RKX-A3-EVK-001 comes with a pair of voltage level shifters (U1, U2) by default that are designated to shift the voltage levels of all digital I/O
pins from the voltage level supported by the host platform (VBUS) and I/O Voltage provided to a sensor (IO_VDD) and vice-versa (Figure 9). This
allows seamless interfacing between such platforms as the Infineon CY8CKIT-059 and Arduino UNO R3, where the I/O voltage can be as high
as 5V with many sensors that are limited to IO_VDD voltage of 3.6V or lower. Please note the following information regarding the voltage level
shifters:
⚫The acceptableinputvoltagerange onthe hostside(B-side)is2.3Vto5.5V
⚫The acceptableinputvoltagerangeonthedevice side (A-side)is 1.65Vto3.6V
⚫Thereisaninternal 10kpull-up resistoron eachside(AandB)ofthelevelshifter.
⚫Level shifters havebeen verified to supportI2Ccommunication (up to 1000kHz) and SPI communication (up to 10MHz) with sensors.
ForI2Ccommunication, it is recommended to have additional pull-up resistors on SDA and SCL lines for faster transient switching. In
manycases,therewillbepull-upresistorsontheevaluationboardthatcomewiththesensor.However,inothercases,itisrecommended
to populate 2.7k resistor at locationsR88 (SDA) and R89 (SCL)on the RKX-A3-EVK-001. Once connected, the effective resistance
wouldbe2.1koneachsignallevel(2.7k ||10k= 2.1k),whichisasufficientvalueforallsensorsatall VDDvoltages.
⚫It ispossibleto bypass the onboard level shifters ifneeded. This can beaccomplished from removing the zero-ohm resistors on Aand
Bsidesofthelevel shifterandconnecting levelshifterbypassresistors (R50-R57).
Figure 9. Voltage Level Shifters for I/O Signals

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2 Interface with Evaluation Boards
Physical Interfacing with ROHM EVK EVB
The RKX-A3-EVK-001 comes with pair of headers that provides an easy way to connect to the standard ROHM EVK EVB that come with a 14-
pin male header. One header is a J5 14-pin male header, and another header is a J6 18-pin female header (Figure 10).
NOTE: The 18-pin female header J6 is mechanically and electrically compatible with the 14-pin male header found on ROHM EVK EVB and
simplify alignment of both connectors relatively to each other. The pins 1, 2 & 17, 18 on J6 are not connected electrically.
Figure 10. ROHM EVK EVB Interface Headers
Thus, there are two ways to conveniently connect the standard ROHM EVK EVB to the RKX-A3-EVK-001 - one is using the 14-pin ribbon cable
plugged into J5 14-pin male header and another is by plugging the evaluation board directly into J6 18-pin female header of Figure 11.
Figure 11. Interface with ROHM EVK EVB

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3 Interface with host platforms
The RKX-A3-EVK-001 is designed to provide an easy hardware interface between ROHM devices and numerous development platforms. Table
4 shows the list of host platforms that can be directly interfaced with the RKX-A3-EVK-001 via compatible headers. Note, that in order to interface
with any given host platform, the proper hardware modifications may be required, including populating headers, and populating / removing certain
zero-ohm resistors. By default, the RKX-A3-EVK-001 is factory populated to support the Infineon CY8CKIT-059 PSoC® 5LP Prototyping kit out
of the box.
Table 4. List of Compatible Host Platforms
* See RKX-A3-EVK-001 schematic (4.2) for details.
Vendor
Platform Name
RKX-A3-EVK-001
HW Interface
Populated on
the board?
Infineon
CY8CKIT-059 (PSoC 5LP)
J14, J15 (26 – pin headers)
Yes
Various 0-ohm resistors*
Yes
CY8CKIT-049 (PSoC 4)
J14, J15 (22 – pin headers)
No
Various 0-ohm resistors*
No
CY8CKIT-044 (PSoC 4M)
J14, J15 (29 – pin headers)
No
Various 0-ohm resistors*
No
CY8CKIT-042-BLE (PSoC4 BLE)
J1, J2, J3, J4
Arduino Compatible Headers
No
Various 0-ohm resistors*
Yes
CY8CKIT-042 (PSoC 4)
CY8CKIT-062-BLE (PSoC 6 BLE)
J1, J2, J3, J4
Arduino Compatible Headers
No
Various 0-ohm resistors*
Yes
CY8CKIT-043 (PSoC 4M)
J1, J2, J3, J4
Arduino Compatible Headers
No
Various 0-ohm resistors*
No
Arduino
Arduino UNO R3
J1, J2, J3, J4
Arduino Compatible Headers
No
Various 0-ohm resistors*
Yes
Raspberry Pi
Pi 1 Model A+ / B+
Pi 2 Model B
Pi 3 Model B / B+
J8
40-pin Header
No

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Infineon CY8CKIT-059 Prototyping Kit
3.1.1 Overview
As was previously described, the RKX-EVK-001 uses the Infineon CY8CKIT-059 Prototyping Kit as the target host adapter platform due to the
numerous advantages it offers including high performance, mixture of onboard digital and analog peripherals, support for Full Speed USB 2.0
connectivity, easy to use IDE with free license, and the low cost.
Figure 12. Infineon CY8CKIT-059 Prototyping Kit
When Infineon CY8CKIT-059 Prototyping Kit is shipped as part of the RKX-EVK-001, it comes pre-loaded with custom firmware, two 26-pin
female headers soldered at locations J1 & J2, and is plugged into the RKX-A3-EVK-001 compatible male header J14 & J15 to provide the plug-
and-play functionality straight out of the box (Figure 13).
Figure 13. CY8CKIT-059 Plugged Directly in RKX-A3-EVK-001

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NOTE: The following content (3.1.1.1 - 3.1.1.3) is provided directly from the manufacturer’s website:
CY8CKIT-059 PSoC® 5LP Prototyping Kit with Onboard Programmer and Debugger (infineon.com)
3.1.1.1 Featuring PSoC™ 5LP
“The CY8CKIT-059 PSoC™ 5LP Prototyping Kit features the CY8C5888LTI-LP097 device from the PSoC™ 5LP family. PSoC™ 5LP is the
industry’s most integrated programmable SoC, combining high-precision and programmable analog and digital peripherals with an ARM Cortex-
M3 CPU in a single chip. Process sensor signals with the 24-bit hardware DFB coprocessor, offload traditional CPU tasks to the CPLD-based
Universal Digital Blocks and increase system performance with the peripheral-to-peripheral DMA controller. Integrate high-precision custom 20-bit
Analog Front Ends with the Programmable Analog Blocks including opamps, PGAs, filters, comparators, SAR and Delta-Sigma ADCs and the
industry's best CAPSENSE™ touch-sensing solution”
3.1.1.2 Design for Flexibility
“The kit provides access to all the PSoC™ 5LP device I/Os in a breadboard-compatible format. It features a micro-USB header for creating
prototypes with Full Speed USB 2.0 connectivity. The kit is also designed with a convenient snappable form-factor, allowing users to separate the
USB connector with the KitProg Programmer and Debugger from the target board to use them independently. Once done with the prototype,
you're still left with a handy SWD programmer”
3.1.1.3 Low-Cost Programmer
“The kit includes Infineon's KitProg Programmer and Debugger. KitProg can program and debug the target PSoC™ 5LP device via SWD when
using PSoC™ Creator or PSoC™ Programmer. It supports bridging over USB-UART and USB-I2C interfaces and also provides access to
Micrium μC/Probe to read and write memory on the target device. When snapped away, this tiny USB board can be used as a KitProg programmer
and debugger with any PSoC™ 3, PSoC™ 4 or PSoC™ 5LP device. The KitProg firmware is provided as a bootloader image that can be
upgraded to develop custom applications for it.”

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3.1.2 Firmware Pinout
The interface between the Infineon PSoC microcontroller mounted on the CY8CKIT-059 Prototyping Kit (RKX-A3-EVK-001 headers J14, J15)
and the sensors mounted on the evaluation board, and either plugged directly to J6 (18-pin receptacle header) or via ribbon cable plugged into J5
(14-pin male header) on the RKX-A3-EVK-001 is shown in Table 5.
Table 5. Physical Mapping of I/O Signals to the Infineon PSoC 5LP MCU
Function in Firmware
14-pin Male
Header Pin J5
18-pin Receptacle
Header Pin J6
RKX-A3-EVK-001
PSoC Headers Pin
J14, J15
PSoC 5LP
I/O Port
RKX-A3-EVK-001
Zero Ohm
Not used in firmware
2
4
J14-1
P2.0
R101
SPI (nCS)
2
4
J14-22
P1.5
R21
X_OUT
3
5
J15-21
P3.4
R108
Y_OUT
4
6
J15-20
P3.5
R31
SPI (SCLK)
5
7
J14-11
P12.5
R16
I2C (SCL)
5
7
J15-11
P0.0
R32
SPI (MOSI/SDI)
7
9
J14-23
P1.6
R12
I2C (SDA)
7
9
J15-10
P0.1
R26
SPI (MISO/SDO) / ADDR
9
11
J14-24
P1.7
R23
SYNC/TRIG
10
12
J14-4
P2.3
R99
INT1
11
13
J14-13
P12.3
R17
INT2
12
14
J14-5
P2.4
R27
nRES
13
15
J14-6
P2.5
R125
Z_OUT
14
16
J15-19
P3.6
R29

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4 About RKX-A3-EVK-001
Board Information
•BoardSize: 86.36mmx76.20mm
•BoardThickness:
•NumberofLayers: 4
•Material:FR-4High Tg
•CopperThickness: 1oz (35μm)
Figure 14. RKX-A3-EVK-001
Schematic Diagram

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Figure 15. Schematic Diagram of RKX-A3-EVK-001

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Bill of Materials
Table 6. Bill of Materials of RKX-A3-LA-EVK-001
Part
Size/Package
Value
Description
Quantity
C1, C2, C3, C4
1608M (0603)
2.2uF
Ceramic Capacitor
4
C5, C6, C7, C8, C9, C10
1608M (0603)
0.1uF
Ceramic Capacitor
6
C11, C12
2012M (0805)
4.7uF
Tantalum Capacitor
2
R1, R5
1608M (0603)
43.2kΩ
Resistor
2
R2
1608M (0603)
38.3kΩ
Resistor
1
R3
1608M (0603)
20kΩ
Resistor
1
R4
1608M (0603)
34kΩ
Resistor
1
R6, R59
1608M (0603)
13.7kΩ
Resistor
2
R7, R127
2012M (0805)
200Ω
Resistor
2
R12, R16, R17, R21, R23,
R24, R26, R27, R28, R29,
R30, R31, R32, R34, R35,
R36, R37, R38, R39, R40,
R41, R42, R43, R44, R45,
R46, R47, R48, R63, R64,
R65, R66, R67, R70, R71,
R72, R73, R74, R75, R76,
R77, R78, R79, R80, R81,
R82, R83, R84, R87, R92,
R93, R96, R97, R98, R99,
R101, R108, R109, R110,
R111, R116, R117, R118,
R119, R120, R121, R122,
R123, R124, R125
1608M (0603)
0Ω
Resistor
70
R58
1608M (0603)
17.4kΩ
Resistor
1
R60
1608M (0603)
15.4kΩ
Resistor
1
R61, R85, R86
1608M (0603)
12.4kΩ
Resistor
3
LED1
3020M (1208)
-
Green LED
1
LED2
2012M (0805)
-
Orange LED
1
VR1, VR2
HTSOP-J8
-
LDO
2
U1, U2
VQFN (14)
-
Voltage Level Translator
2
SW1, SW3
SPDT
-
Slide switch
2
SW2
SP7T
-
Switch Rotary
1
SW4
SPDT
-
Slide switch
1
J5
14pin
-
Connector
1
J6
14pin
-
Connector
1
J12
24pin
-
Connector
1
J13
20pin
-
Connector
1
J14, J15
26pin
-
Connector
2

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© 2022 ROHM Co., Ltd.
No. 64UG116E Rev.002
Feb.2022
User’s Guide
Layout (Top View)
Figure 16. Layouts of RKX-A3-LA-EVK-001

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© 2022 ROHM Co., Ltd.
No. 64UG116E Rev.002
Feb.2022
User’s Guide
5 Troubleshooting and known issues
In case of connection problems or an application crash, please check the error log file of the ROHM EVK GUI SW. The default path of this file
is: ..\Documents\ROHM_EVK_v3\ROHM-EVK-GUI\errorlog.txt
Communication Troubleshooting
5.1.1 RKX-EVK-001 Communication Issues
The communication between the ROHM EVK GUI SW and RXK-EVK-001 may not work for several reasons. The issue can be related to
hardware, software, or both. The following steps can be used as a guidance to troubleshoot such issues.
5.1.1.1 “Status: EVK Disconnected” in ROHM EVK GUI SW Status Bar
Figure 17. Status Bar, Disconnected
This status means that the ROHM EVK GUI is not connected to the host adapter board.
NOTE: This error example issue is limited for RKX-EVK-001 connections.
If the text “Status: EVK Disconnected” appears in the Status bar, please check the following:

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© 2022 ROHM Co., Ltd.
No. 64UG116E Rev.002
Feb.2022
User’s Guide
Figure 18. ROHM-EVK-001 status: LED1, SW4, LED2, LED1 (CY8CKIT-059) must be ON
1. TheblueLED1(CY8CKIT-059)shouldbeconstantlyONandnotblinking(Figure18)
•If the blue LED1 (CY8CKIT-059) is blinking, the CY8CKIT-059 is not programmed with the ROHM EVK FW. Please program the latest
ROHM EVK FW. See (3.1 Firmware Update Procedure in ROHM EVK SW User’s Guide) for details.
•If the blue LED1 (CY8CKIT-059) is turned OFF, please try the following:
•Check that the micro-USB cable is securely connected to the CY8CKIT-059 Prototyping Kit and to the USB port on the PC.
•Connect to a different USB port on the PC.
•Replace the micro-USB cable with a new, high quality, USB certified cable.
2. ThegreenLED1(Figure18).
•If the green LED1 is OFF but the blue LED1 (CY8CKIT-059) is ON:
•EnsuretheCY8CKIT-059PrototypingKitissecurelyconnectedtotheRKX-A3-EVK-001.