Traditional Pin Header Jumpers; Default Jumper Configuration; Figure 8. Copper Jumpers; Table 1. Default Jumper Settings - Renesas RA6 Series User Manual

Renesas RA Family
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.)

4.5.2 Traditional Pin Header Jumpers

These jumpers are traditional small pitch jumpers that require an external shunt to open/close them. The
traditional pin jumpers on the EK-RA6M3 board are 2 mm pitch headers and require compatible 2 mm shunt
jumpers.

4.5.3 Default Jumper Configuration

The following table describes the default settings for each jumper on the EK-RA6M3 board. This includes
copper jumpers (Ex designation) and traditional pin jumpers (Jx designation.)
The Circuit Group for each jumper is the designation found in the board schematic (available in the Design
Package). Functional details for many of the listed jumpers may be found in sections associated with each
functional area of the kits.

Table 1. Default Jumper Settings

Location Circuit Group
J7 USB HS
J8 J-Link OB
J9 J-Link OB
J12 USB FS
J15 USB FS
J16 MCU Boot Mode
J17 USB HS
J29 J-Link OB
E1 MCU Power
E2 MCU Power
E3 MCU Power
R20UT4629EU0101 Rev.1.01
Jan.30.20

Figure 8. Copper Jumpers

Default Open/Closed
Jumper on pins 1-2
Jumper on pins 1-2
Open
Jumper on pins 2-3
Jumper on pins 1-2
Open
Open
Jumper on pins 1-2
Jumper on pins 3-4
Jumper on pins 5-6
Jumper on pins 7-8
Closed
Closed
Closed
EK-RA6M3G v1 – User's Manual
Function
Sets USB power to host mode
Configures J-Link OB as the on-board debugger
Configures Reset# for on-board debugger mode
Sets USB power to device mode
Connects micro-USB power to system power
Configures the MCU for normal boot mode
Connects micro-USB power to system power
Connects the J-Link OB debugger to the RA MCU
Connects VREFL to GND
Connects VREFH to +3.3 V
Connects AVCC0 to +3.3 V
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