Renesas EK-RA4E2

Renesas RA Family EK-RA4E2 v1 – User's Manual
R20UT5175EG0300 Rev. 3.00 Page 11 of 30
Feb.27.23
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.
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 6. Copper Jumpers
4.3.2 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-RA4E2 board are 2 mm pitch headers and require compatible 2 mm shunt
jumpers.
4.3.3 Default Jumper Configuration
The following table describes the default settings for each jumper on the EK-RA4E2 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 2. Default Jumper Settings
Location
Circuit Group
Default Open/Closed
Function
J6
J-Link OB
Closed
Configures J-Link OB connection to MCU mode
J8
J-Link OB
Jumper on pins 1-2
Configures the MCU for normal operation
J9
J-Link OB
Open
Enables the on-board debugger
J16
MCU boot
mode
Open
Configures the MCU for normal boot mode
J29
J-Link OB
Jumper on pins 1-2
Jumper on pins 3-4
Jumper on pins 5-6
Jumper on pins 7-8
Connects the J-Link OB debugger to the RA MCU
E14
Pmod 1
Closed
Connects P110 (MISOA/RXD9) to Pmod 1 pin 3
E15
Pmod 1
Closed
Connects P111 (RSPCKA/SCK9) to Pmod 1 pin 4
E16
Pmod 1
Closed
Connects +3.3 V to Pmod 1 pin 6 and pin 12
E17
Pmod 1
Open
Connects +5.0 V to Pmod 1 pin 6 and pin 12
E18
Pmod 1
Open
Connects P100 (SCL) to Pmod 1 pin 3
E19
Pmod 1
Open
Connects P101 (SDA) to Pmod 1 pin 4
E26
User LED
Closed
Connects P104 to user LED2
E27
User LED
Closed
Connects P207 to user LED1
E28
User LED
Closed
Connects P112 to user LED3