Ebyte E22 Series - Connect to MCU

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22D User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
8
configured as open-drain or push-pull output
5
AUX
Output
To indicate module ’ s working status & wakes up the external MCU. During the
procedure of self-check initialization, the pin outputs low level. Can be
configured as push-pull output (suspending is allowed).
6
VCC
Input
Power supply ：2.3~ 5.5V DC
7
GND
Input
Ground
8
Fixed hole
-
Connect to GND
9
Fixed hole
-
Connect to GND
10
Fixed hole
-
Connect to GND
4. Connect to MCU
No.
Description（STM8L MCU）
1
The UART module is TTL level.
2
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.