EFM8BB3 Datasheet, PDF (30/70 Pages) Silicon Laboratories – The EFM8BB3 device family are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted features are listed below

EFM8BB3 Data Sheet
Typical Connection Diagrams
5.2 Debug
The diagram below shows a typical connection diagram for the debug connections pins. The pin sharing resistors are only required if
the functionality on the C2D (a GPIO pin) and the C2CK (RSTb) is routed to external circuitry. For example, if the RSTb pin is connec-
ted to an external switch with debouncing filter or if the GPIO sharing with the C2D pin is connected to an external circuit, the pin shar-
ing resistors and connections to the debug adapter must be placed on the hardware. Otherwise, these components and connections
can be omitted.
For more information on debug connections, see the example schematics and information available in AN127: "Pin Sharing Techniques
for the C2 Interface." Application notes can be found on the Silicon Labs website (http://www.silabs.com/8bit-appnotes) or in Simplicity
Studio.
EFM8BB3 Device
C2CK
C2D
GND
VIO
1k
1k
External
System
(if pin sharing)
1k
(if pin sharing)
1k
1k
Debug Adapter
Figure 5.2. Debug Connection Diagram
5.3 Other Connections
Other components or connections may be required to meet the system-level requirements. Application Note AN203: "8-bit MCU Printed
Circuit Board Design Notes" contains detailed information on these connections. Application Notes can be accessed on the Silicon
Labs website (www.silabs.com/8bit-appnotes).
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