Power Supply Considerations; Power-Up Behavior; Debug And Trace; Figure 9. Test Point Location - Renesas RA8 Series User Manual

Renesas RA Family
5.1.1.3 Option 4: 5V Test Points
5 V may be supplied from an external power supply to test points on the board. TP7 (5 V) and TP9 (GND)
are loop-style test points, and J60 provides large via style test points that can accommodate a 0.1" pin
header or connector. The two types of test points are electrically equivalent, and both are provided for user
convenience. Power from this source is connected to the main system 5 V power. Reverse current protection
is provided between the 5 V test points and the main system 5 V power. TP7 (5 V), TP9 (GND) and J60 can
be found at the top left of the board above Pmod1.

5.1.2 Power Supply Considerations

The on-board LDO regulator which supplies +3.3 V has a built-in current limit of 2.0 A. Make sure the total
current required by the RA MCU, any active on-board features, and any connected peripheral devices does
not exceed this limit.
Note: The total current available from a typical enumerated USB host is 500 mA maximum. Depending on
the configuration of the kit, multiple power sources may be required.

5.1.3 Power-up Behavior

When powered, the white LED near the center of the board (the "dash" in the EK-RA8M1 name) will light up.
For more details on initial power up behavior, see the EK-RA8M1 Quick Start Guide.

5.2 Debug and Trace

The EK-RA8M1 board supports the following three debug modes.

Table 3. Debug Modes

Debug Modes Debug MCU
(the device that
connects to the
IDE on PC)
Debug on-board J-Link On Board
(on-board)
Debug in External
debugging tools
Debug out J-Link On Board
(on-board)
Notes:
• See Table 5 for the Debug USB connector pin definition.
• See Table 8 for the 20-pin JTAG connector pin definition.
• See Table 9 for the 10-pin JTAG connector pin definition.
R20UT5149EG0100 Rev 1.00
Oct.03.23

Figure 9. Test Point Location

Target MCU Debugging
Interface/Protocol
(the device that
is being
debugged)
RA8M1 SWD
(on-board)
RA8M1 SWD, ETM, JTAG
(on-board)
Any external RA SWD
MCU
EK-RA8M1 v1 – User's Manual
Connector Used
Micro USB (J10)
20-pin connector (J20) or
10-pin connector (J13)
Micro USB (J10) plus either
20-pin connector (J20) or
10-pin connector (J13)
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