On-Board Debugger - Silicon Laboratories BG22 Explorer Kit User Manual

3.5 On-board Debugger

The BG22 Explorer Kit contains a microcontroller separate from the EFR32BG22 Wireless Gecko that provides the user with an on-
board J-Link debugger through the USB Micro-B port. This microcontroller is referred to as the "on-board debugger", and is not pro-
grammable by the user. When the USB cable is removed, the on-board debugger goes into a very low power shutoff mode (EM4S),
consuming around 80 nA typically (EFM32GG12 data sheet number).
In addition to providing code download and debug features, the on-board debugger also presents a virtual COM port for general pur-
pose application serial data transfer. The Packet Trace Interface (PTI) is also supported which offers invaluable debug information
about transmitted and received packets in wireless links.
The figure below shows the connections between the target EFR32BG22 device and the on-board debugger.
Refer to chapter 4. Debugging
Host
PC
silabs.com | Building a more connected world.
for more details on debugging.
USB
On-Board
J-Link
Debugger
Figure 3.4. On-Board Debugger Connections
DBG_VCOM_TX
DBG_VCOM_RX
DBG_VCOM_CTS
DBG_VCOM_RTS
DBG_SWCLK
DBG_SWDIO
DBG_SWO
DBG_PTI_DATA
DBG_PTI_FRAME
DBG_RESET
UG509: BG22 Explorer Kit User's Guide
EFR32BG22
EFR32MG
PA05 (USART1.TX)
PA06 (USART1.RX)
PA08 (USART1.CTS)
PA07 (USART1.RTS)
PA01 (GPIO.SWCLK)
PA02 (GPIO.SWDIO)
PA03 (GPIO.SWV)
PC04 (FRC.DOUT)
PC05 (FRC.DFRAME)
RESETn
Rev. 1.1 | 9
Hardware