Chengdu Ebyte Electronic Technology Co., Ltd.
E103-W03 _User Manual _EN_V1.1
Copyright ©2012–2022, Chengdu Ebyte Electronic Technology Co., Ltd
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7
Chapter 4 Recommended Connection Diagram
Notice:
1. The power supply must be guaranteed at 2.3V~3.6V. In order to ensure the stable operation of the module, the
RF transmission power will be affected by factors such as the response speed of the LDO. If there is a high requirement
for the communication distance, it is recommended to select an external LDO with a power supply capacity greater than
600mA powered by.
2. The RXD/TXD of E103-W03 are respectively connected to the MCU_TXD/MCU_RXD of the external MCU.
3. When powering on, the SOP1 pin needs to be connected to a 1M pull-up resistor, and SOP0 and SOP2 are
connected to a pull-down resistor (the module has already connected SOP0 and SOP2 to the pull-down resistor, so it will
not be processed here). Otherwise it will not work properly.
4. If secondary development is required, the connection mode of SOP0, SOP1, and SOP2 pins is also recommended
to be 010. For other modes, please refer to the relevant development manual of CC3220R and choose the mode by
yourself.
5. If there is a high requirement for low power consumption, it is recommended to cancel the pull-up of SOP1 and
connect it to the IO port of the microcontroller. It only needs to pull the module high at the moment of power-on, and pull
SOP1 low after the module works normally. At this time, the sleep current can be reduced by about 3.3uA when the
power consumption is low.
