Chengdu Ebyte Electronic Technology Co.,Ltd.
E22-400T22D User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
4-7
(suspending is allowed).
6
VCC
Power supply
Module power supply positive reference, voltage range: 2.3
～
5.5V DC
7
GND
Power supply
Ground
8
Fixed hole
Fixed hole
（
Connect to GND on the module
）
9
Fixed hole
Fixed hole
（
Connect to GND on the module
）
10
Fixed hole
Fixed hole
（
Connect to GND on the module
）
4. Connect to MCU
No.
Description
（
STM8L MCU
）
1
The UART module is TTL level, please connect with TTL level MCU.
2
For some MCU works at 5V DC, it may need to add 4
～
10K pull-up resistor for the TXD & AUX pin.
