Chengdu Ebyte Electronic Technology Co., Ltd.
E220P-400T22S User Manual
Copyright ©2012–2020,
Chengdu Ebyte Electronic Technology Co., Ltd.
5
Size
16*26 mm
-
Antenna
IPEX/stamp hole
50 ohm impedance
3. Size and Pin Definition
No.
Name
Direction
Features
1
GND
-
Ground
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.
8
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin.
9
AUX
Output
Used to indicate the working status of the module;
The user wakes up the external MCU and outputs low level during power-on
self-check initialization; (can be left floating)
10
VCC
-
Power supply: 2.3~ 5.5V DC
