Renesas RA Family
FPB-RA4E1 v1 – User's Manual
R20UT4958EG0100 Rev 1.00
Page 12 of 23
Sep.07.21
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
FPB-RA4E1
Pin
Description
Signal/Bus
J9-1
+5 VDC
+5V_USB_DBG
J9-2
Data-
SEGGER J-Link On-Board Data-
J9-3
Data+
SEGGER J-Link On-Board Data+
J9-4
USB ID, jack internal switch, cable inserted
NC
J9-5
Ground
GND
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.
Figure 7. FPB-RA4E1 Debug Interface
5.2.1.1 Debugger Link Settings
Table 4. Debug Link Settings
Link
Setting
Function
E28
Closed
Open
Normal debugger operation
P201/MD and P300/TCK/SWCLK are not connected
E30
Closed
Open
Debugger held in reset (RA4E1 MCU free-running operation)
Normal debugger operation
