Ebyte E22-230T22S - Page 10

Chengdu Ebyte Electronic Technology Co., Ltd. E22-230T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
9
2
GND
Ground
3
GND
Ground
4
GND
Ground
5
M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not
suspended, if not used, could be grounded).
6
M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not
suspended, if not used, could be grounded).
7
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can
be configured as open-drain or pull-up input.
8
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can
be configured as open-drain or push-pull output
9
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).
10
VCC
Power supply ：2.3~ 5.2V DC
11
GND
Ground
12
NC
13
GND
Ground
14
NC
15
NC
16
NC
17
NC
18
NC
19
GND
Ground
20
GND
Ground
21
ANT
Antenna
22
GND
Ground