Users Manual

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T30S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
11
During the procedure of self-check initialization, the pin outputs low level.
Can be configured as push-pull output (can be suspended).
6
VCC
Input
Power supply ：3.3~ 5.5V DC
7
GND
Input
Ground
8
NC
Input
can be suspended
9
GND
Input
Ground
10
NC
Input
can be suspended
11
NC
Input
can be suspended
12
NC
Input/output
can be suspended
13
NC
Input/output
can be suspended
14
NC
Input/output
can be suspended
15
GND
Ground
16
GND
Ground
17
GND
Ground
18
ANT
output
High frequency signal output, 50 ohm characteristic impedance
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.