Ebyte E220-230T30S, Руководство пользователя, Страница: 8 / 24

Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T30S User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
7
Pin No. Pin Name Pin Direction Pin Function
1 GND
Input
Module ground
2 VCC
Input
Voltage range: 3.0
～
5.5V DC
3 AUX Output
Used to indicate the working status of the module; wakes up the external
MCU, and outputs low level during power-on self-check initialization; (can be
left floating)
4 TXD Output TTL UART outputs, connects to external RXD input pin.
5 RXD
Input
TTL UART inputs, connects to external TXD output pin.
6 M1
Input
（
weak pull-up
）
Work with M0 to decide 4 working modes of module (not float, if not used,
could be grounded).
7 M0
Input
（
weak pull-up
）
Work with M1 to decide 4 working modes of module (not float, if not used,
could be grounded).
11 ANT Output Antenna interface (high frequency signal output, 50 ohm impedance)
12 GND Fixed ground
13 GND Fixed ground
14 GND Fixed ground
18 NC Input/Output NC pin, this pin needs to be left floating (for subsequent expansion)
19 NC Input/Output NC pin, this pin needs to be left floating (for subsequent expansion)
20 NC Input/Output NC pin, this pin needs to be left floating (for subsequent expansion)
21 NC
Input
(Users do not need to connect, to be left floating)
22 NC
Input
(Users do not need to connect, to be left floating)
23 GND
Input
Fixed ground
24 NC
Input
(Users do not need to connect, to be left floating)