Ebyte E103-W05A, User Manual

Page: 8 / 33

Chengdu Ebyte Electronic Technology Co., Ltd. E03-W05A User Manual
Copyright ©2012–2020
，
Chengdu Ebyte Electronic Technology Co., Ltd 7
No. Pin item Direction Application
1
GND
P
Ground wire, connected to the power reference ground
2
NC
IO
Floating, GPIO0 of the internal chip, programming enable
pin, low level enable
3
NC IO
Floating, GPIO16 of the internal chip can be used as input
and output pins
4
RXD I Serial port receiving pin, support AT command
5
TXD O Serial port sending pin, support AT command
6
NC IO Floating, WAKE pin of the chip, high level wake up
7
RST
I
Hardware reset pin, low level reset
8
VCC
P
Power supply, range 3.0
～
3.6V (standard 3.3V)
Note: I:input; O:output; P:power supply
Chapter 4 Basic Operation
4.1 Hardware design

It is recommended to use a DC stabilized power supply to supply power to the module. The power supply ripple
factor should be as small as possible, and the module should be grounded reliably.
；

Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse
connection may cause permanent damage to the module
；

Please check the power supply to ensure that it is between the recommended supply voltages. If the maximum value
is exceeded, the module will be permanently damaged
；

Please check the stability of the power supply, the voltage should not fluctuate greatly and frequently
；

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% margin,
because the whole machine is conducive to long-term stable operation
；

The module should be as far away as possible from the power supply, transformer, high-frequency wiring and other
parts with large electromagnetic interference
；

High-frequency digital wiring, high-frequency analog wiring, and power wiring must avoid the bottom of the