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NINA-B4 series - System integration manual
UBX-19052230 - R06
Appendix
Page 42 of 45
C1-Public
SMT
Surface-Mount Technology
SPI
Serial Peripheral Interface
SWD
Serial Wire Debug
Thread
Networking protocol for Internet of Things (IoT) "smart" home automation devices to communicate on a
local wireless mesh network
THT
Through-Hole Technology
TXD
Transmit Data
UART
Universal Asynchronous Receiver/Transmitter
UICR
User Information Configuration Registers
USB
Universal Serial Bus
VCC
IC power-supply pin
VSWR
Voltage Standing Wave Ratio
Zigbee
Open standard protocol, full-stack solution for most large smart home ecosystem providers
Table 15: Explanation of the abbreviations and terms used