Chapter 3 Mechanical Dimensions And Pin Definitions - Ebyte E22-400T30S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

Chapter 3 Mechanical Dimensions and Pin Definitions

Pin
Pin Number
Name
1 M0
2 M1
3 RXD
4 TXD
5 AUX
6 VCC
7 GND
8 C2CK
9 GND
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7
Pin Direction
Input (very weak pull-up)
Input (very weak pull-up)
Input
Output
Output
Input
Input
Input
Input
Cooperate with M1 to determine the 4 working modes of the module (not
floating, if not used, it can be grounded)
Cooperate with M0 to determine the 4 working modes of the module (not
floating, if not used, it can be grounded)
TTL serial port input, connected to the external TXD output pin;
TTL serial port output, connected to external RXD input pin;
Used to indicate the working status of the module; the user wakes up
the external MCU, and outputs a low level during the initialization of
the power-on self-test; (can be suspended)
Module power positive reference, voltage range: 3.3 ~ 5.5V DC
Module ground
Clock pin when the program is loaded (dangling, users do not need to connect)
The ground pin when the program is loaded (dangling, the user does not need
to connect)
E22-400T30S_User Manual _EN
Pin Usage