Renesas RA Series User manual

Rev.1.02 Jul 2020
Renesas RA Family
RA6 Series
User’s Manual
www.renesas.com
All information contained in these materials,including products and product specifications, represents
information on the product at the time of publication and is subject to change by Renesas Electronics
Corp. without notice. Please review the latest information published by Renesas Electronics Corp.
through various means, including the Renesas Electronics Corp. website (http://www.renesas.com).
RA6M2 Group
Evaluation Kit
for RA6M2 Microcontroller Group
EK-RA6M2 v
1
User’s
Manual
User’s Manual

© 2020 Renesas Electronics Corporation. All rights reserved.
Notice
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Evaluation Kit RA6M2 (EK-RA6M2) Disclaimer
By using this EK-RA6M2, the User accepts the following terms, which are in addition to, and control in the event of disagreement, with Renesas’ General
Terms and Conditions available at https://www.renesas.com/en-us/legal/disclaimer.html.
The EK-RA6M2 is not guaranteed to be error free, and the entire risk as to the results and performance of the EK-RA6M2 is assumed by the User. The EK-
RA6M2 is provided by Renesas on an “as is” basis without warranty of any kind whether express or implied, including but not limited to the implied
warranties of good workmanship, fitness for a particular purpose, title, merchantability, and non-infringement of intellectual property rights. Renesas
expressly disclaims any implied warranty.
Renesas does not consider the EK-RA6M2 to be a finished product and therefore the EK-RA6M2 may not comply with some requirements applicable to
finished products, including, but not limited to recycling, restricted substances and electromagnetic compatibility regulations. Refer to Certifications section,
for information about certifications and compliance information for the EK-RA6M2. It is the kit User’s responsibility to make sure the kit meets any local
requirements applicable to their region.
Renesas or its affiliates shall in no event be liable for any loss of profit, loss of data, loss of contract, loss of business, damage to reputation or goodwill, any
economic loss, any reprogramming or recall costs (whether the foregoing losses are direct or indirect) nor shall Renesas or its affiliates be liable for any
other direct or indirect special, incidental or consequential damages arising out of or in relation to the use of this EK-RA6M2, even if Renesas or its affiliates
have been advised of the possibility of such damages.
Renesas has used reasonable care in preparing the information included in this document, but Renesas does not warrant that such information is error free
nor does Renesas guarantee an exact match for every application or parameter to part numbers designated by other vendors listed herein. The information
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descriptions at any time without notice. Renesas assumes no liability for any damages incurred by you resulting from errors in or omissions from the
information included herein. Renesas cannot verify, and assumes no liability for, the accuracy of information available on another company’s website.
Precautions
This Evaluation Kit is only intended for use in a laboratory environment under ambient temperature and humidity conditions. A safe separation distance
should be used between this and any sensitive equipment. Its use outside the laboratory, classroom, study area, or similar such area invalidates conformity
with the protection requirements of the Electromagnetic Compatibility Directive and could lead to prosecution.
The product generates, uses, and can radiate radio frequency energy and may cause harmful interference to radio communications. There is no guarantee
that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception, which can be
determined by turning the equipment off or on, you are encouraged to try to correct the interference by one or more of the following measures:
• Ensure attached cables do not lie across the equipment.
• Reorient the receiving antenna.
• Increase the distance between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that which the receiver is connected.
• Power down the equipment when not in use.
• Consult the dealer or an experienced radio/TV technician for help.
Note: It is recommended that wherever possible shielded interface cables are used.
The product is potentially susceptible to certain EMC phenomena. To mitigate against them it is recommended that the following measures be undertaken:
• The user is advised that mobile phones should not be used within 10 m of the product when in use.
• The user is advised to take ESD precautions when handling the equipment.
The Evaluation Kit does not represent an ideal reference design for an end product and does not fulfill the regulatory standards for an end product.

User’s Manual
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Renesas RA Microcontrollers
EK-RA6M2 v1 – User's Manual
Contents
1. Kit Overview............................................................................................................................3
1.1 Assumptions and Advisory Notes ........................................................................................................... 5
2. Kit Contents.............................................................................................................................6
3. Ordering Information................................................................................................................6
4. Hardware Details.....................................................................................................................7
4.1 Jumpers Settings..................................................................................................................................... 7
4.1.1 Copper Jumpers.................................................................................................................................... 7
4.1.2 Default Board Configuration.................................................................................................................. 7
5. Hardware Layout.....................................................................................................................9
5.1 System Block Diagram............................................................................................................................ 9
5.2 Power Requirements............................................................................................................................... 9
5.2.1 Power Supply Options........................................................................................................................... 9
5.2.1.1 Option 1: Debug USB (default) ........................................................................................................10
5.2.1.2 Option 2: Test Points TP3 and TP4 .................................................................................................10
5.2.1.3 Option 3: Test Points TP1 and TP2 .................................................................................................10
5.2.1.4 Option 4: Pin Headers...................................................................................................................... 11
5.2.2 Powering up the Board........................................................................................................................ 11
5.2.3 Battery Supply Configuration .............................................................................................................. 12
5.2.4 Measuring Current Consumption ........................................................................................................12
5.3 Main Components ................................................................................................................................. 13
5.4 Connectivity and Settings......................................................................................................................14
5.4.1Device USB.........................................................................................................................................14
5.4.2 Debug USB ......................................................................................................................................... 15
5.4.3 JTAG/SWD..........................................................................................................................................16
5.4.4 LEDs....................................................................................................................................................17
5.4.5 Switches.............................................................................................................................................. 17
5.4.6 PMOD A ..............................................................................................................................................18
5.4.7 PMOD B ..............................................................................................................................................19
5.4.8 User Capacitive Touch Button ............................................................................................................ 19
5.5 Pin Headers........................................................................................................................................... 20
5.5.1 Pin Header J1...................................................................................................................................... 22
5.5.2 Pin Header J2...................................................................................................................................... 22
5.5.3 Pin Header J3...................................................................................................................................... 24

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5.5.4 Pin Header J4...................................................................................................................................... 25
5.6 Additional Features ...............................................................................................................................25
5.6.1 Analog Reference Voltages ................................................................................................................25
5.6.2 On-Board Clock Crystals..................................................................................................................... 26
5.6.3 User Potentiometer ............................................................................................................................. 26
5.6.4 Boot Configuration...............................................................................................................................27
5.6.5 Miscellaneous Signals......................................................................................................................... 27
5.6.5.1AVCC0/AVSS0..................................................................................................................................27
5.6.5.2 VCL ................................................................................................................................................... 28
5.6.5.3 Ext VCL0 and VCL0 Cap ..................................................................................................................28
5.6.5.4 VCC_USB ......................................................................................................................................... 29
5.6.5.5 Signal P205....................................................................................................................................... 29
6. Certifications..........................................................................................................................30
6.1 EMC/EMI Standards.............................................................................................................................. 30
6.2 Material Selection, Waste, Recycling and Disposal Standards ............................................................30
6.3 Safety Standards...................................................................................................................................30
7. Design and Manufacturing Information..................................................................................31
8. Website and Support.............................................................................................................31
Revision History............................................................................................................................32

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1. Kit Overview
The EK-RA6M2 v1 enables developers to get started with initial firmware development.
•Renesas RA6M2 Microcontroller Group
R7FA6M2AF3CFB
144-pin LQFP package
120 MHz Arm®Cortex®-M4 core with Floating Point Unit (FPU)
384 KB SRAM
1 MB code flash memory
32 KB data flash memory
•Connectivity
A Device USB connector for the Main MCU
SEGGER J-Link®On-Board (OB) interface for debugging and programming of the RA6M2 MCU. A 10-
pin JTAG/SWD interface is also provided for connecting optional external debuggers and
programmers.
Two PMOD connectors, allowing use of appropriate PMOD compliant peripheral plug-in modules for
rapid prototyping
Pin headers for access to power and signals for the Main MCU
•Multiple clock sources
Main MCU oscillator crystals, providing precision 12.000 MHz and 32,768 Hz external reference
clocks
Additional low-precision clocks are available internal to the Main MCU
•MCU reset push-button switch
•MCU boot configuration jumper
•General purpose I/O ports
One jumper to allow measuring of Main MCU current
Copper jumpers on PCB bottom side for configuration and access to selected MCU signals
•Operating voltage
External 5 V input through the Debug USB connector supplies the on-board power regulator to power
logic and interfaces on the board. Alternatively, 5 V or 3.3 V may be supplied through alternate
locations on the board.
•A two-color board status LED indicating availability of regulated power and connection status of the J-Link
interface
•A red User LED, controlled by the Main MCU firmware
•A User Push-Button switch, User Capacitive Touch Sensor (button), and an optional User Potentiometer,
all are controlled by the Main MCU firmware

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Figure 1. EK-RA6M2 v1 Top Side

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Figure 2. EK-RA6M2 v1 Bottom Side
1.1 Assumptions and Advisory Notes
1. It is assumed that the user has a basic understanding of microcontrollers and embedded systems
hardware

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2. It is recommended that the user refer to the EK-RA6M2 - Quick Start Guide to become acquainted with
the kit and the Quick Start example the EK-RA6M2 comes preprogrammed with.
3. Flexible Software Package (FSP) and Integrated Development Environment (IDE) such as e2studio are
required to develop embedded applications on EK-RA6M2. Instructions to download and install software
are provided in the Quick Start Guide.
4. Additionally, the instructions to import example projects, build them and program the EK-RA6M2 are also
provided in the Quick Start Guide.
2. Kit Contents
The following components are included in the kit:
1. One EK-RA6M2 board
2. One USB Type-A to Micro-B cable
Figure 3. EK-RA6M2 v1 Kit Contents
3. Ordering Information
EK-RA6M2 Orderable Part Number: RTK7EKA6M2S00001BU
1
2

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4. Hardware Details
4.1 Jumpers Settings
4.1.1 Copper Jumpers
Copper jumpers are of two types, designated trace-cut and solder-bridge.
A trace-cut jumper is provided with a narrow copper trace connecting its pads. The silk screen overlay
printing around a trace-cut jumper is a solid box. To isolate the pads, cut the trace between pads adjacent to
each pad then remove the connecting copper foil either mechanically or with the assistance of heat. Once
the etched copper trace is removed, the trace-cut jumper is turned into a solder-bridge jumper for any later
changes.
A solder-bridge jumper is provided with two isolated pads that may be joined together by one of three
methods:
•Solder may be applied to both pads to develop a bulge on each and the bulges joined by touching a
soldering iron across the two pads.
•A small wire may be placed across the two pads and soldered in place.
•A SMT resistor, size 0805, 0603, or 0402, may be placed across the two pads and soldered in place. A
zero-ohm resistor shorts the pads together.
The silk screen overlay printing around a solder-bridge jumper is a box with a gap in the lines adjacent to the
isolation region between the pads.
For any copper jumper, the connection is considered closed if there is an electrical connection between the
pads (default for trace-cut jumpers). The connection is considered open if there is no electrical connection
between the pads (default for the solder-bridge jumpers).
Figure 4. Copper Jumpers
4.1.2 Default Board Configuration
The following table describes the default settings for each jumper on the EK-RA6M2. This includes traditional
pin jumpers (Jxdesignation) and copper jumpers (Exdesignation).
The Circuit Group for each jumper is the designation found in the board schematic. See section 7, Design
and Manufacturing Information. Functional details for many of the listed jumpers may be found in section 5.4,
Connectivity and Settings and section 5.6, Additional Features.
Table 1. Default Jumper Settings
Location
Circuit Group
Default
Open/Closed
Function
J8
MCU Mode Config
Jumper on pins 1-2
Sets the MCU Mode to boot from Internal Flash
E18
12M XTAL
Open
Connects signal P213 to MCU
E19
Open
Connects signal P212 to MCU
E23
Closed
Connects 12.000 MHz Crystal to MCU
E24
Closed
Connects 12.000 MHz Crystal to MCU
E1
3.3 V Linear Regulator
Closed
Alternate 3.3V source (+3V3JLOB)
E22
32K XTAL
Open
Connects signal P215 to MCU
E25
Closed
Connects 32.768 kHz Crystal to MCU
E26
Closed
Connects 32.768 kHz Crystal to MCU
E2
Capacitive Touch-Button
Closed
Enable/Disable Capacitive Touch-Button
E5
Open
Connects signal P207J to Capacitive Touch-
Button

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Location
Circuit Group
Default
Open/Closed
Function
E54
EXT VCL and VCL CAP
Closed
Connects MCU VCL to a capacitor
E55 Open Connects MCU VCL to the VCL signal
E28
EXT VCL0 and VCL0 CAP
Open
Connects VCL to MCU
E29 Closed Connects MCU pin 15 (VCL) to capacitor
E32
J-Link
Closed
Connects the S124 MCU to the J-Link signal
JLED
E33 Closed Connects the S124 MCU to the J-Link signal
RESET#
E34
Closed
Connects the S124 MCU to the J-Link signal
TDO(/SWO) P109
E37 Closed Connects the S124 MCU to the J-Link signal
P108/SWDIO
E38
Closed
Connects the S124 MCU to the J-Link signal
P300/SWCLK
E35 J-Link®OB USB Closed Connects the J-Link OB USB 5V input to the
primary 5V->3.3V voltage regulator
E31
JTAG Connector
Open
JTAG Ground Detect. Connects the JTAG
connector pin 9 to Ground.
E10 MCU VREF Closed Connects AVCC0 to +3V3MCU
E11
Closed
Connects AVSS0 to Ground
E50 Closed Connects VREFH0 to +3V3MCU
E51
Closed
Connects VREFL0 to Ground
E52 Closed Connects VREFH to +3V3MCU
E53
Closed
Connects VREFL to Ground
E12 P205 or TSCAP-A Open Connects MCU pin 43 to signal P205
E15
Closed
Connects MCU pin 43 to capacitor
E30 USB Device Interface Closed Connects the Device USB 5V input to the MCU
E16
USB FS
Closed
Connects MCU pin 38 to signal USB_N
E17 Closed Connects MCU pin 39 to signal USB_P
E20
Open
Connects MCU pin 39 to signal USBPH_P
E21 Open Connects MCU pin 38 to signal USBPH_N
E3
User LED
Closed
Enable/Disable User LED
E36 User Potentiometer Open Enable/Disable User Potentiometer
E4
User Push-Button
Closed
Enable/Disable User Push-Button switch
E6 VBAT +3V3_MCU Closed Dual Jumper. Pins 1-3 connect +3V3 to
+3V3MCU. Pins 2-4 connect +3V3 to VBAT.
E14
VCC USB
Open
Connects VCC_USB to MCU pin 40
E8 Closed Connects +3V3MCU to MCU pin 40

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5. Hardware Layout
5.1 System Block Diagram
Figure 5. EK-RA6M2 Block Diagram
5.2 Power Requirements
EK-RA6M2 is designed for 3.3 V operation. This also means that 5 V PMOD devices cannot be used
together with the EK-RA6M2 unless they are powered separately.
The total current available from the LDO regulator for all connected circuits is 600 mA or less, depending on
the 5 V power source used.
5.2.1 Power Supply Options
EK-RA6M2 board can be powered in several different ways as described in this section.
User
Modules
Config
Jumpers USB FS Device
12 M and
32 K
Crystals 3.3V LDO J-Link
S124
MCU
Status
Two-Color
LED
Power
Measurement
Jumper
Reset
Switch
PMOD A,
PMOD B Main MCU Pin Headers User Push-Button User LED
User
Potentiometer
Capacitive
Touch
Button
JTAG Port
J-Link USB
Main MCU
USB FS
Host
Programming or
Debugging PC
Voltage/
Current
Probes
Port Simulation/Simulation
or
Development Daughter Card
Renesas RA Family
RA6M2 MCU Group
Evaluation Kit

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Figure 6. Power Supply Options
5.2.1.1 Option 1: Debug USB (default)
The default power source is 5 V, supplied from an external USB host to the USB Debug
connector labelled DEBUG USB on the top surface of the board. A low drop-out regulator
(LDO) is used to convert the 5 V signal to 3.3 V, which then is used to power the MCU and
any connected devices.
Copper jumper E35 selects the source for the primary power input to the LDO regulator. By
default, this jumper is configured to provide power through the Debug USB connector.
Copper jumper E35 is closed for this configuration.
5.2.1.2 Option 2: Test Points TP3 and TP4
The EK-RA6M2 board can also be powered by installing a 5 V power source across TP3 (positive input) and
TP4 (negative input). Copper jumper E35 must be opened to enable powering the board using these test
points.
The on-board Low Dropout Regulator (see section 5.3, Main Components) has an input
voltage range of +3.3 V to +5.5 V, and a built-in current limit of 600 mA. Make sure that any
external power source connected to TP3 and TP4 meets these requirements.
Figure 7. USB Debug Connector (J11), TP3, and TP4 on the Evaluation Kit Board
5.2.1.3 Option 3: Test Points TP1 and TP2
The EK-RA6M2 board can also be powered by installing a 3.3 V source across TP1 (positive input) and TP2
(negative input). Copper jumper E35 must be open to enable powering the board using these test points.
Figure 8. TP1, TP2, and LED1 on the Evaluation Kit Board
These test points supply voltage directly to the RA6M2 MCU, the S124 J-Link MCU,
and other on-board circuitry. Use caution to ensure that any voltage connected in this
manner meets the power requirements for the active features. Power sources that are

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outside of the published operating range for the active devices may cause degraded
performance or damage the board.
5.2.1.4 Option 4: Pin Headers
EK-RA6M2 board can also be powered through the following pin-headers.
•J1 (pin J1-15 for +3.3 V, pin J1-17 for Return)
•J2 (pin J2-10 for +3.3 V, pin J2-12 for Return)
•J4 (pin J4-37 for +3.3 V, pin J4-36 for Return)
Copper jumper E35 must be open for any of these configurations.
The pin headers supply voltage directly to the RA6M2 MCU, the S124 J-Link MCU, and
other on-board circuitry. Use caution to ensure that any voltage connected in this
manner meets the power requirements for the active features. Power sources that are
outside of the published operating range for the active devices may cause degraded
performance or damage the board.
See section 5.5, Pin Headers for more information on the Pin Headers.
Figure 9. 5 V Power Input Circuit
Figure 10. 3.3 V Power Regulator Circuit
5.2.2 Powering up the Board
When powered, the green LED to the right of the DEVICE USB connector (LED2) lights up.
The red LED in the same LED package functions as a status indicator for the J-Link®On-Board (OB) debug
interface on the board. If both LEDs in the LED2 package are lit, LED2 appears orange.

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Figure 11. LED2 on the Evaluation Kit Board (Top Side)
5.2.3 Battery Supply Configuration
An external battery may be connected according to the methods outlined in section 5.2.1, Power Supply
Options, providing that it meets the minimum voltage and current requirements.
Additionally, an external battery source may be connected to VBAT at Pin Header location J2-29 (J2-12
ground return) to maintain the MCU Realtime Clock (RTC) when other main power sources are disconnected
from the EK-RA6M2 board.
5.2.4 Measuring Current Consumption
Pads 1 and 3 of the copper jumper E6, which is a dual trace-cut jumper, allow measurement of +3V3 MCU
supply current. Pads 2 and 4 of E6 allow measurement of VBAT supply current. Both traces are connected
by default. These traces should be cut to enable power measurement. Care must be taken when cutting the
trace to not cause damage to PCB layers below the trace.
The actual current consumed by the RA6M2 MCU is dependent on many factors, including ambient
temperature, internal clock speed, input voltage level, and device activity. The actual current consumed by
the MCU can vary from less than 1 mA to nearly 40 mA. For more information on the electrical
characteristics of the MCU, see the RA6M2 Microcontroller Group User’s Manual.
Figure 12. MCU Current Measurement Circuit
Figure 13. E6 on the Evaluation Kit Board (Top side)

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Figure 14. E6 on the Evaluation Kit Board (Bottom side)
Once the shorting traces have been removed, there are several options to measure current:
•Pins can be installed that allow connection of a precision multi-meter or bench meter, or leaded current
shunt to allow oscilloscope or data logger connection. When not measuring the current, this allows easily
installed and removed shunts to be used to short the jumper terminals.
•Another option is to install current sense resistors between pads 1 and 3 for +3V3 MCU, and between
pads 2 and 4 for VBAT. Precision non-inductive film or foil resistors are recommended for use in this
application, and the value of each resistor should be carefully considered.
For example, if the expected current requirement for the +3V3 MCU supply voltage is 10 mA, and the
user would expect to measure a 10 mV drop across the current measurement resistor, then a 1.0-ohm
resistor should be selected and installed.
The actual value selected should be based on the operating conditions of the MCU for the specific user
application, and the sensitivity of the measurement equipment used.
5.3 Main Components
•Main MCU
Renesas RA6M2 MCU device, part number R7FA6M2AF3CFB (U1)
•J-Link MCU
Renesas Synergy™ S124 MCU device, part number R7FS124773A01CFM#AA0 (U2)
•USB Connectors
FCI, part number 10118192-0001LF (J9, J11)
•Micro USB 2.0 Female connector
•Primary communication with Main MCU and J-Link MCU
•Push-Buttons
C&K, part number PTS645SM43SMTR92 LFS (S1, S2)
•Momentary push-button switch
•Used for system reset and user defined functions
•LDO Regulator
Diodes Inc., part number AP7215-33YG-13 (U3)
•Low-drop out linear regulator
•Generates system 3.3 V from J-Link USB 5 V input
•PMOD A Connector
Samtec, part number SSW-106-02-F-D-RA (J5)
•12-pin right angle connector for PMOD A
•PMOD B Connector
Samtec, part number SSW-106-02-FM-S-RA (J6)
•6-pin right angle connector for PMOD B
•Pin Headers
Sullins, part number PRPC020DAAN-RC (J1, J2, J3, J4)
•40 position pin header, 0.1” pitch
•Provides signal breakout and access for Main MCU signals
•System LED
Dialight, part number 598-8610-207F (LED2)
•Dual color red/green LED
•System status indicator for power and J-Link status

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•User LED
Lite-On, part number LTST-C191KRKT (LED1)
•User defined
•Single color red LED as needed for user environment
•User Potentiometer
Bourns, part number 3352T-1-1-3LF (POT1)
•User defined
•Provides variable resistance as needed for user environment
•Not populated by default
5.4 Connectivity and Settings
Throughout this section, feature configuration using copper jumpers is described. See section 4.1.1, Copper
Jumpers for information on using copper jumpers.
5.4.1 Device USB
The DEVICE USB Micro-B connection jack connects the Main MCU to an external USB
Host, FS capable, allowing communications for testing and use of the Main MCU firmware.
Power for the Evaluation Kit cannot be received from this connector. The DEVICE USB
interface can detect the presence of power from the USB Host PC. USB Host power
received at the DEVICE USB interface is not connected to the 5 V power bus.
Table 2. DEVICE USB Connector (J9)
USB Device Connector
EK-RA6M2
Pin
Description
Signal/Bus
1
+5VDC, connected to a sense voltage 2/3 divider
to allow Main MCU sensing of Host presence
+5VUSB
P407/USB_VBUS = 2/3(5VUSB)
2
Data-
P915/USB_DM
3
Data+
P914/USB_DP
4
USB ID, jack internal switch, cable inserted
N.C.
5
Ground
GND
USB FS copper jumpers E16, E17, E20, and E21 configure the connection between the
Device USB jack and the Main MCU. To allow use of the Device USB jack, copper jumper
E16 and E17 must be closed, and copper jumpers E20 and E21 must be open.
USB_VBUS copper jumper E30 configures P407 as a VBUS power detector. E30 is closed
by default to enable Device USB detection. To use P407 for any other purpose, E30 should
be open.
VCC USB copper jumpers E8 and E14 configure the source for the VCC USB power. To provide
VCC_USB from +3V3MCU, E8 must be closed. To isolate VCC_USB from +3V3MCU, E8 must
be open. To source +3V3MCU power from J1, or to monitor VCC_USB voltage from J1, E14
pads must be closed, otherwise, E14 should be left open.
The VCC_USB pin on the MCU (pin 40) is used to detect the presence of a USB connection.

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Table 3. USB Source Copper Jumper Settings
Copper
Jumper
USB Signal Source
Device USB
Micro-B Connector
MCU Pin Header
Function
E16
Closed
Open
USB N signal to MCU
E17
Closed
Open
USB P signal to MCU
E8
Closed
Open
+3V3MCU to MCU VCC_USB
E30
Closed
Open
Connect USB 5V to MCU P407
E20
Open
Closed
USB P signal to MCU
E14
Open
Closed
USB Micro-B 3.3V to MCU VCC_USB
E21
Open
Closed
USB N signal to MCU
P407 is also used by the Capacitive Touch interface.
Figure 15. USB Device Interface Circuit
5.4.2 Debug USB
The DEBUG USB Micro-B connection jack connects the S124 J-Link MCU to an external
USB Host, FS capable, allowing re-programming and debugging of the Main MCU
firmware. Power for the Evaluation Kit may be received from this connector.
The J-Link®OB interface is multiplexed with the JTAG interface, and can collectively be
referred to as the Programming Interface. While the J-Link OB interface and the JTAG
interface do not conflict, the J-Link OB signals may be isolated from the programming
interface by changing the associated copper jumpers.
J-Link Disconnect Copper Jumpers E32, E33, E34, E37, and E38, connect the J-Link
signals to the MCU programming interface. To isolate the J-Link signals from the JTAG
interface, the copper jumpers must be open. To allow use of the J-Link interface, each
copper jumper must be closed.
J-Link MCU Power Copper Jumper, E1, connects the main +3.3 V power to the J-Link
+3.3 V power. The default condition for E1 is closed, which connects the J-Link MCU
power to the main +3.3 V power. If J-Link signals are disconnected, the power to the J-Link
MCU should also be removed by changing E1 to open.

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Table 4. DEBUG USB Connector (J11)
DEBUG USB Connector
EK-RA6M2
Pin
Description
Signal/Bus
1
+5VDC
+5V_JUSB
2
Data-
U2 USB_DM (U2-18)
3
Data+
U2 USB_DP (U2-19)
4
USB ID, jack internal switch, cable inserted
N.C.
5
Ground
GND
Three of the J-Link ports (P108, P109, and P300) are multiplexed with the SPI Fixed Pin Function on pin
header J1. To use these signals for the SPI function, the J-Link debug function must be disabled. Details of
the multiplexed signals are shown in the following table.
Table 5. J-Link Interface Conflicts
Programming Interface
Conflicting Interface
Port
Use
Interface
Use
P108
SWDIO/JTAG TMS
SPI
SSLB0 fixed function, J1-13
P109
SWO/JTAG TDO
SPI
MOSIB fixed function, J1-7
P300
SWCLK/JTAG TCK
GPT
GTIOC0A fixed function, J1-31
5.4.3 JTAG/SWD
A 10-pin Cortex®Debug Connector is provided at J10.
Table 6. JTAG Connector (J10)
JTAG Connector
EK-RA6M2
Pin
JTAG pin name
SWD pin name
Signal/Bus
1
VTref
VTref
+3V3
2
TMS
SWDIO
U1 P108/SWDIO (U1-51)
3
GND
GND
GND
4
TCK
SWCLK
U1 P300/SWCLK (U1-50)
5
GND
GND
GND
6
TDO
SWO
U1 P109 (U1-52)
7
Key
Key
N.C.
8
TDI
NC/EXTb
U1 P110 (U1-53)
9
GNDDetect
GNDDetect
N.C. (short E31 to connect to GND)
10
nSRST
nSRST
U1 RESET# (U1-38)
The Cortex®Debug Connector is fully described in the Arm®CoreSight™Architecture Specification.
The J-Link MCU Power Copper Jumper and J-Link Disconnects Copper Jumpers may be
open for proper operation of the JTAG interface to prevent interactions with the J-Link
MCU. See section 5.4.2, Debug USB for details.
If a JTAG adapter that properly interprets the Arm®Cortex 10-pin Debug Connector
assignment of pin 9 to GND is in use, the JTAG GNDDetect copper jumper E31 should be
closed. If the JTAG adapter used is one of several that may be confused or damaged by
the presence of GND at pin 9, E31 should be open (as shipped).
The J-Link®OB interface is multiplexed with the JTAG interface, and can collectively be referred to as the
Programming Interface. While the J-Link®OB interface and the JTAG interface do not conflict, the J-Link®
OB signals may be isolated from the programming interface by changing the copper jumpers as described in
section 5.4.2, Debug USB.
Four of the JTAG ports (P108, P109, P110, and P300) are multiplexed with the SPI Fixed Pin function on pin
header J1. To use these signals for the SPI function, the J-Link debug function must be disabled. Details of
the multiplexed signals are shown in the following table.

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Table 7. JTAG Interface Conflicts
Programming Interface
Conflicting Interface
Port
Use
Interface
Use
P108
TMS/J-Link SWDIO
SPI
SSLB0_B fixed function, J1-13
P109
TDO/J-Link SWO
SPI
MOSIB_B fixed function, J1-7
P110
TDI
SPI
MISOB_B fixed function, J1-9
P300
SWCLK
GPT
GTIOC0A_A fixed function, J1-31
5.4.4 LEDs
Two LEDs are provided on the EK-RA6M2 board. U1 is the Main MCU, and directly controls LED1. See
Figure 8 for LED1 location, Figure 11 for LED2 location, and Figure 10 for LED2 circuit. U2 is the J-Link
MCU, and it controls the red LED in LED2.
Figure 16. LED1 Control Circuit
The behavior of the LEDs is described in the following table.
Table 8. LED Functions on the Evaluation Kit
Designator
Color
Function
MCU Control Port
MCU Pin
LED1
Red
User LED
U1 P106
U1-102
LED2
Red
J-Link Indicator
JLED (U2 P103)
U2-45
LED2
Green
3.3 V Power Available
+3V3
N.A.
To disconnect the User LED from the MCU signal P106, the copper jumper E3 must be
open.
5.4.5 Switches
Two miniature, momentary, mechanical push-button type SMT switches are mounted on
the EK-RA6M2 board. Pressing the RESET Switch generates a reset signal to restart the
Main MCU.
To disconnect the User Switch from the MCU signal P105/IRQ0, copper jumper E4 must
be open.
Table 9. Switches on the Evaluation Kit
Designator
Function
MCU Control Port
MCU Pin
S1
User Switch
U1 P105/IRQ0
U1-103
S2
MCU Reset Switch
RESET#
U1-55