Jumper Settings; Copper Jumpers; Traditional Pin Header Jumpers; Default Jumper Configuration - Renesas RX600 Series User Manual

Renesas RX Family

4.3 Jumper Settings

Two types of jumpers are provided on the CK-RX65N board.
1. Copper jumpers (trace-cut type and solder bridge type)

2. Traditional pin header jumpers

The following sections describe each type and their default configuration.

4.3.1 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. The silkscreen
overlay printed around a solder-bridge jumper has gaps in the surround. Three methods can be used for
joining:
•
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.)
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 CK-RX65N board are 2.54 mm (0.1") pitch headers and require compatible
2.54 mm shunt jumpers.

4.3.3 Default Jumper Configuration

The following table describes the default settings for each jumper on the CK-RX65N 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 kit.

Table 2. Default Jumper Settings

Location Circuit Group
J1 Pmod 1
J2 MCU Power
J7 Pmod 2
J11 MCU Boot Mode
J15 E2OB Debugger
R20UT5100EG0100 Rev. 1.00
May.17.22

Figure 5. Copper Jumpers

Default Open/Closed
Open
Closed
Open
Open
Open
CK-RX65N v1 – User's Manual
Function
Current Measurement point for Pmod 1
Current Measurement point for MCU
Current Measurement point for Pmod 2
Configures the MCU for normal boot mode
Select debugger comms mode
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