Ebyte E220-900T22S, Руководство пользователя

Страница: 8 / 23

Chengdu Ebyte Electronic Technology Co., Ltd. E220-900T22S User Manual
Copyright ©2012–2020,
Chengdu Ebyte Electronic Technology Co., Ltd.
7
No. Name Direction Features
1 GND - Ground
2 GND - Ground
3 GND - Ground
4 GND - Ground
5 M0
Input
（
weak pull-up
）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
6 M1
Input
（
weak pull-up
）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
7 RXD Input TTL UART inputs, connects to external (MCU, PC) TXD output pin.
8 TXD Output TTL UART outputs, connects to external RXD (MCU, PC) input pin.
9 AUX Output
Used to indicate the working status of the module;
The user wakes up the external MCU and outputs low level during power-on
self-check initialization; (can be left floating)
10 VCC - Power supply: 2.3~ 5.2V DC
11 GND - Ground
12 NC - Empty Pin
13 GND - Ground
14 NC - Empty Pin
15 NC - Empty Pin
16 NC - Empty Pin
17 NC - Empty Pin
18 NC - Empty Pin
19 GND - Ground
20 GND - Ground
21 ANT - Antenna
22 GND - Ground