Ebyte E77-M22S Series - Mechanical Dimensions and Pin Definitions; Dimensional drawing; Pin definition

Chengdu Ebyte Electronic Technology Co., Ltd. E77-xxxM22S User Manual
Copyright © 2012-2 024 , Chengdu Ebyte Electronic Technology Co., Ltd.
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3 Mechanical Dimensions and Pin Definitions
3.1 Dimensional drawing
3.2 Pin definition
Pin
number
Pin name
Pin direction
Pin usage
1
PB3
input
Output
TX_LED, transmit data indication pin, output high level when
transmission is completed
2
PB4
input
Output
RX_LED, receive data indication pin, output high level after receiving
3
PB5
input
Output
LINK_LED, network access status indicator pin, outputs high level if
network access is successful
4
PB6
input
Output
USART1_TX (the built-in firmware is not used, reserved)
5
PB7
input
Output
USART1_RX (comes with firmware, not used, reserved)
6
PB8
input Output
Configurable general-purpose IO port (see STM32WLE5CCU6
manual for details)
7
PA0
input Output
Soft boot pin, pull it low continuously for 1s after power on to enter