Renesas S1JA User manual

Rev.1.01 Apr 2020
Renesas Synergy™ Platform
Synergy Tools & Kits
Kits:
TB-S1JA v1.0
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).
Target Board Kit S1JA (TB-S1JA)
User’s Manual
User’s Manual

© 2020 Renesas Electronics Corporation. All rights reserved.
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Renesas Synergy™ Target Board Kit S1JA (TB-S1JA) Disclaimer
By using this TB-S1JA, 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 TB-S1JA is not guaranteed to be error free, and the entire risk as to the results and performance of the TB-S1JA is assumed by the User. The TB-
S1JA 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 satisfactory quality, fitness for a particular purpose, title, and non-infringement of intellectual property rights with regard to the TB-S1JA. Renesas
expressly disclaims all such warranties.
Renesas does not consider the TB-S1JA a finished product and therefore the TB-S1JA may not yet comply with some requirements applicable to finished
products, including, but not limited to recycling (WEEE), CE, UL, restricted substances (ROHS), FCC, FEE, and electromagnetic compatibility regulations.
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 TB-S1JA, 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
provided in this document is intended solely to enable the use of Renesas products. No express or implied license to any intellectual property right is
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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 Renesas Synergy™ Target Board 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 Renesas Synergy™ Target Board 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
Renesas Synergy™ Platform
Target Board Kit S1JA (TB-S1JA)
R12UM0025EU0101 Rev.1.01 Page 1 of 31
Apr.21.20
Contents
1. Overview .................................................................................................................................3
2. Kit Contents.............................................................................................................................5
3. Getting Started with Embedded Application Development on TB-S1JA...................................6
4. TB-S1JA Hardware Details......................................................................................................7
4.1 Jumpers and DIP Switch 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.........................................................................................................................10
5.2.2 Powering up the Board........................................................................................................................12
5.2.3 Measuring Current Consumption ........................................................................................................12
5.3 Major Components................................................................................................................................14
5.4 Connectivity and Settings......................................................................................................................15
5.4.1 Device USB.........................................................................................................................................15
5.4.2 Debug USB..........................................................................................................................................15
5.4.3 SWD (JTAG)........................................................................................................................................16
5.4.4 LEDs ..............................................................................................................................................16
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......................................................................................................................................23
5.5.3 Pin Header J3......................................................................................................................................24
5.5.4 Pin Header J4......................................................................................................................................25
5.6 Additional Features................................................................................................................................26
5.6.1 Analog Reference Voltages.................................................................................................................26
5.6.2 On-Board Clock Crystals.....................................................................................................................26
5.6.3 User Potentiometer .............................................................................................................................27
5.6.4 Boot Configuration...............................................................................................................................27

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5.6.5 Miscellaneous Signals.........................................................................................................................28
6. Certifications..........................................................................................................................29
6.1 EMC/EMI Standards..............................................................................................................................29
6.2 Material Selection, Waste, Recycling and Disposal Standards ............................................................29
6.3 Safety Standards...................................................................................................................................29
7. Design and Manufacturing Information ..................................................................................29
Revision History............................................................................................................................31

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1. Overview
The Target Board Kit S1JA (TB-S1JA) enables developers get started with initial firmware development and
evaluation of the Synergy Software Package (SSP) on the S1JA MCU Group.
•Renesas Synergy™ S1JA Microcontroller Group
R7FS1JA783A01CFM
64-pin Low Profile Quad Flat Pack (LQFP) package
48 MHz Arm®Cortex®-M23 core (Armv8-M architecture) with Arm MPU
32 KB SRAM
256 KB code flash memory
8 KB data flash memory
•Connectivity
A Device USB connector for the Main MCU
S124 MCU based SEGGER J-Link®On-Board (OB) interface for debugging and programming of the
S1JA 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 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 5V input through the Debug USB connector supplies the on-board power regulator, which
provides 3.3V to power the Target Board logic and interfaces. External 5V or 3.3V may be also
supplied through alternate locations on the Target 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 Button sensor, and an optional User Potentiometer,
all of which are controlled by the Main MCU firmware

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Figure 1. TB-S1JA Top Side

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Figure 2. TB-S1JA Bottom Side
2. Kit Contents
The following components are included in the Target Board Kit (TB-S1JA):
•1x TB-S1JA board
•1x USB Type-A to USB Micro-B cable

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3. Getting Started with Embedded Application Development on TB-S1JA
To develop and execute embedded applications on the TB-S1JA using the Synergy Platform, Synergy
Software Package and development tools are required to be installed on your computer.
Step 1: Create My Renesas Account (if you do not have one already)
You need a My Renesas account to download software, development tools, and application projects. Log in
to or Sign up for a My Renesas account at www.update.renesas.com/SSO/login.
Step 2: Download and Install Synergy Software Package and Development Tools
The Synergy Software Package, J-Link USB drivers, and one of the two supported tool chains are bundled
and available as single downloadable file as follows:
A. IAR Platform Installer installs Synergy Software Package and IAR Embedded Workbench®for
Renesas Synergy™ IDE with IAR complier and J-Link USB drivers.
Download from www.renesas.com/synergy/ewsynergy.
B. e2studio Platform Installer installs Synergy Software Package and e2studio for Synergy IDE with
IAR complier and J-Link USB drivers.
Download from www.renesas.com/synergy/e2studio.
Note: The TB-S1JA uses J-Link®On-board (OB) debug interface. While J-Link drivers are necessary to
establish debug connection between the host PC and the TB-S1JA, they are not required to run the
Out-of-Box (OoB) Demonstration (Blinky) Application that the TB-S1JA comes pre-programmed with.
Refer to the TB-S1JA Quick Start Guide for more details.
Step 3: Explore Existing Application Projects for the TB-S1JA
Renesas provides several application projects to demonstrate different capabilities of the S1JA MCU Group.
These application projects can also serve as a good starting point for you to develop your custom
applications. Application projects available for the TB-S1JA are listed at http://www.renesas.com/synergy/tb-
s1ja.
Notes: 1. Every application project includes the project files, an application note, and instructions to import
the application project.
2. On downloading the application project from the website to your computer, the application projects
have to be built using one of the two supported tool chains before they can be downloaded on to
the TB-S1JA board.

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4. TB-S1JA Hardware Details
4.1 Jumpers and DIP Switch 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 3. Copper Jumpers
4.1.2 Default Board Configuration
The following table describes the default settings for each jumper on the TB-S1JA Target Board. This
includes traditional pin jumpers (Jxdesignation) and copper jumpers (Exdesignation.)
The Circuit Group for each jumper is the designation found in the board schematic. Functional details for
many of the listed jumpers may be found in Section 4.4, Connectivity and Settings, and section 4.6,
Additional Features.
Table 1. Default Jumper Settings
Location
Circuit Group
Default
Open/Closed
Function
J8
MCU Mode Config
Shunt on pins 1-2
Sets the MCU Mode to boot from Internal Flash
E18
12M Crystal
Open
Connects P213/XTAL on MCU to J2-21
E19
Open
Connects P212/EXTAL on MCU to J2-19
E23
Closed
Connects 12.000 MHz Crystal to MCU
E24
Closed
Connects 12.000 MHz Crystal to MCU
E1
3.3V Linear Regulator
Closed
Alternate 3.3 V source (+3V3JLOB)
E22
32K Crystal
Open
Connects P215/XCIN on MCU to J2-25
E25
Closed
Connects 32.768 kHz Crystal to MCU
E26
Closed
Connects 32.768 kHz Crystal to MCU
E27
Open
Connects P214/XCOUT on MCU to J2-23
E10
AVCC0-> +3V3MCU
Closed
Connects +3V3MCU to AVCC0
E11
AVSS0->GND
Closed
Connects Ground to AVSS1

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Location
Circuit Group
Default
Open/Closed
Function
E2
Capacitive Touch
Button
Closed
Enable/Disable Capacitive Touch Button
(connects P001 on MCU to Capacitive Touch
Button)
E5
Open
Connects P001 on MCU to J2-20
E28
EXT VCL and VCL 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#
E37
Closed
Connects the S124 MCU to the J-Link signal
P100/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.
E13
LDO and VCC USB
Open
Connects VCC_USB_LDO to MCU pin 41
E14
Open
Connects VCC_USB_LDO to MCU pin 40
E7
Closed
Connects +3V3MCU to MCU pin 41
E8
Closed
Connects +3V3MCU to MCU pin 40
E12
P409/CAN or TSCAP-E
Open
Connects P409/CAN on MCU to J1-29
E30
USB Device Interface
Closed
Connects the Device USB 5V input to the MCU
E16
USB FS
Closed
Connects P915/USB_DM on MCU to signal
USB_N
E17
Closed
Connects P914/USB_DP on MCU to signal
USB_P
E20
Open
Connects P914/USB_DP on MCU to signal
USBPH_P
E21
Open
Connects P915/USB_DM on MCU 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
+3V3_MCU
Closed
Dual Jumper. Pins 1 and 3 connect +3V3 to
+3V3MCU. Pins 2 and 4 are not used.
E41
CRX0_B (P408) -> J1
Closed
Connects P408 on MCU to J1-27
E42
CMPIN1 (P408) -> J3
Closed
Connects P408 on MCU to J3-4
E43
SSLB0_C (P102) -> J1
Closed
Connects P102 on MCU to J1-11
E44
ANSD1P (P102) -> J3
Closed
Connects P102 on MCU to J3-6
E45
AVCC1 -> +3V3MCU
Closed
Connects +3V3MCU to AVCC1
E46
AVSS1 -> GND
Closed
Connects AVSS1 to Ground

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5. Hardware Layout
5.1 System Block Diagram
Figure 4. TB-S1JA Block Diagram
5.2 Power Requirements
TB-S1JA is designed for 3.3 V operation. This also means that 5 V PMOD devices cannot be used together
with the TB-S1JA 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.

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5.2.1 Power Supply Options
TB-S1JA can be powered in several different ways as described in this section.
Figure 5. 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
TB-S1JA 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 4.3, Major 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 any external power source connected to TP3 and TP4 meets these requirements.
Figure 6. USB Debug Connector (J11), TP3, and TP4 on Target Board
5.2.1.3 Option 3: Test Points TP1 and TP2
TB-S1JA 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 7. TP1, TP2, and LED1 on Target Board
These test points supply voltage directly to the S1JA 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.

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5.2.1.4 Option 4: Pin Headers
TB-S1JA can also be powered through the following pin-headers on the board.
•J1 (pin J1-15 for +3.3V, pin J1-17 for Return)
•J2 (pin J2-10 for +3.3V, pin J2-12 for Return)
•J4 (pin J4-37 for +3.3V, pin J4-36 for Return)
Copper jumper E35 must be open for any of these configurations.
The pin headers supply voltage directly to the S1JA 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 4.5, Target Board Pin Headers for more information on the Pin Headers.
Figure 85 V Power Input Circuit
Figure 9. 3.3 V Power Regulator Circuit

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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 debug
interface on the board. If both LEDs in the LED2 package are lit, LED2 appears orange.
Figure 10.LED2 on Target Board (Top Side)
5.2.3 Measuring Current Consumption
Pads 1 and 3 of copper jumper E6, which is a trace-cut jumper, allow measurement of +3V3 MCU supply
current. Trace is connected by default and 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 S1JA 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. Refer to the S1JA User’s Manual for more
information on the electrical characteristics of the MCU.
Figure 11.MCU Current Measurement Circuit
Figure 12.E6 on Target Board (Top Side)
Figure 13.E6 on Target Board (Bottom Side)

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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 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 +3V3MCU. 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.

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5.3 Major Components
•Main MCU
Renesas SynergyTM S1JA MCU device, part number R7FS1JA783A01CFM#AA0 (U1)
•J-Link MCU
Renesas SynergyTM 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
•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

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5.4 Connectivity and Settings
Throughout this section, feature configuration using copper jumpers is described. See section 3.1.1, 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 Target Board 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 Target Board 5 V
power bus.
Table 2. DEVICE USB Connector (J9)
USB Device Connector
TB-S1JA
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
Connections in Table 2 are based on the condition of copper jumpers E16, E17, E20,
E21, and E30 matching their as-manufactured status. As manufactured, E16 and E17 are
closed, E20 and E21 are open, and E30 is closed.
Alternatively, the Device USB signals to the Main MCU may be connected to MCU Pin
Header J1. To enable this configuration, copper jumpers E16 and E17 should be open,
and E20 and E21 should be closed.
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 Target Board
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, 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 +3.3V power to the J-Link
+3.3V power. The default condition for E1 is closed, which connects the J-Link MCU
power to the main +3.3V power. If J-Link signals are disconnected, the power to the
J-Link MCU should also be removed by changing E1 to open.
Table 3. DEBUG USB Connector (J11)
DEBUG USB Connector
TB-S1JA
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

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5.4.3 SWD (JTAG)
A 10-pin Cortex Debug Connector is provided at J10.
Note: S1JA MCU does not have JTAG support, only SWD.
Table 4. SWD (JTAG) Connector (J10)
JTAG Connector
TB-S1JA
Pin
SWD pin name
Signal/Bus
1
VTref
+3V3
2
SWDIO
U1 P108/SWDIO (U1-33)
3
GND
GND
4
SWCLK
U1 P300/SWCLK (U1-32)
5
GND
GND
6
N.C.
N.C.
7
N.C.
N.C.
8
N.C.
N.C.
9
GNDDetect
N.C. (short E31 to connect to GND)
10
nSRST
U1 RESET# (U1-25)
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 SWD interface to prevent interactions with the J-Link MCU. See section 4.4.2, Debug USB
for details.
If a SWD (JTAG) adapter is in use that properly interprets the Arm®Cortex®10-pin Debug
connector assignment of pin 9 to GND, SWD GNDDetect copper jumper E31 should be
closed. If the SWD 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 SWD interface, and can collectively be referred to as the
Programming Interface. While the J-Link OB interface and the SWD 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 4.4.2, Debug USB.
5.4.4 LEDs
Two LEDs are provided on the TB-S1JA Target Board. Target Board U1 is the Main MCU, and directly
controls LED1. See Figure 6 for LED1 location, Figure 9 for LED2 location, Figure 13 for LED1 circuit, and
Figure 8 for LED2 circuit. Target Board U2 is the J-Link MCU, and controls the red LED in LED2.
Figure 14.LED1 Control Circuit

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The behavior of the LEDs is described in the following table.
Table 5. Target Board LED Functions
Designator
Color
Function
MCU control port
MCU pin
LED1
Red
User LED
U1 P205
U1-23
LED2
Red
J-Link Indicator
JLED
(U2 P103)
U2-45
LED2
Green
3.3V Power Available
+3V3
N.A.
To disconnect the User LED from the MCU signal P205, copper jumper E3 must be open.
5.4.5 Switches
Two miniatures, momentary, mechanical push-button type SMT switches are mounted
on the Target Board. Pressing the RESET Switch generates a reset signal to restart
the Main MCU. To disconnect the User Switch from the MCU signal P206/IRQ6_A,
copper jumper E4 must be open.
Note: The correct port number for User SW (E4) is P206 as shown in the following schematic diagram. The
board photograph (v1.2) showing P105 for the User SW (E4) (snippet shown to the right) is incorrect
and should be P206 instead.
Table 6. Target Board Switches
Designator
Function
MCU Control Port
MCU Pin
S1
User Switch
U1 P206/IRQ6_A
U1-22
S2
MCU Reset Switch
RESET#
U1-25
Figure 15.User Switch Circuit
Figure 16.User Switch (S1) on Target Board