Size And Pin Definition - Ebyte E49-900T20S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd

3. Size and pin definition

No. Name
1 GND
2 GND
3 GND
4 GND
Input （pull up when
5 M0
Input （pull up when
6 M1
7 RXD
8 TXD
9 AUX
10 VCC
11 GND
12 NC
13 GND
14 NC
15 NC
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Direction
Cooperate with M1 to determine 4 operating modes of the module(can be lifted
it's weak）
Cooperate with M0 to determine 4 operating modes of the module(can be lifted
it's weak）
Input
Output
Used to indicate the working status of the module; the user wakes up the external
Output
MCU and outputs a low level during the power-on self-test initialization
Module power supply positive reference, voltage range: 2.6V ~ 5.5V DC
Function
Module ground wire
Module ground wire
Module ground wire
Module ground wire
floating, the module contains pull-up resistor）
floating, the module contains pull-up resistor）
TTL serial input, connect to external TXD output pin;
TTL serial input, connect to external RXD output pin;
Module ground wire
Module ground wire
E49-900T20S User Manual
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