Chengdu Ebyte Electronic Technology Co.,Ltd. E73-TBX User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd.
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Choose: Onboard PCB antenna Choose: IPEX interface
1.4.2. Power Supply and Serial Port
The USB port on the development board provides 5V power for the development board, and it is also the
communication port of the onboard USB to serial port chip CH340G and PC. The development board supports USB port
and JLINK debugger power supply. But please don't both supply power at the same time.
1.4.3. Program Download Interface
The development board has reserved 4-wire SWD interface, support common debugging tools such as JLINK
V8, JLINK V9. It’s not recommend to use JLINK OB, which is bad for NRF52 and unstable.
The position of the debug port is as follows: there is a pin definition on the back of the test board, please check,
pay attention: VCC=3.3V