Power-Up Behavior; Debug And Trace; Segger J-Link Emulator On-Board; Figure 7. Fpb-Ra4E1 Debug Interface - Renesas RA4 Series User Manual

Renesas RA Family

5.1.3 Power-up Behavior

When powered, the green LED (not fitted) next to the DEBUG/POWER legend will illuminate. The yellow
DEBUG/POWER LED will also illuminate.

5.2 Debug and Trace

The FPB-RA4E1 board can be programmed and debugged using the built-in SEGGER J-Link Emulator On-
Board debugger.

5.2.1 SEGGER J-Link Emulator On-Board

Debug USB micro-B connector (J9) connects the SEGGER J-Link debugger to an external USB full speed
host, allowing re-programming and debugging of the target RA MCU firmware.
The J-Link Emulator On-Board debugger connects to the target RA MCU using the SWD interface.

Table 3. Debug USB Connector

Debug USB Connector
Pin Description
J9-1
+5 VDC
J9-2 Data-
J9-3 Data+
J9-4 USB ID, jack internal switch, cable inserted
J9-5
Ground
A yellow indicator, DEBUG/POWER, shows the visual status of the debug interface. When the FPB-RA4E1
board is powered on, and the DEBUG/POWER LED is blinking, it indicates that the SEGGER J-Link
Emulator On-Board debugger is not connected to a programming host. When the DEBUG/POWER LED is
on solid, it indicates that it is connected to a programming interface. When the DEBUG/POWER LED is
flickering, it indicates that data is being transferred between the SEGGER J-Link Emulator On-Board
debugger and the programming host.
5.2.1.1 Debugger Link Settings

Table 4. Debug Link Settings

Link Setting
E28 Closed
Open
E30 Closed
Open
R20UT4958EG0100 Rev 1.00
Sep.07.21

Figure 7. FPB-RA4E1 Debug Interface

Function
Normal debugger operation
P201/MD and P300/TCK/SWCLK are not connected
Debugger held in reset (RA4E1 MCU free-running operation)
Normal debugger operation
FPB-RA4E1 v1 – User's Manual
FPB-RA4E1
Signal/Bus
+5V_USB_DBG
SEGGER J-Link On-Board Data-
SEGGER J-Link On-Board Data+
NC
GND
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