Chengdu Ebyte Electronic Technology Co., Ltd.
E22-xxxT22S series product user manual
Copyright©2012–2024
, Chengdu Ebyte Electronic Technology Co., Ltd.
9
impedance)
13
GND
-
Module ground wire
14
GND
-
Module ground wire
15
GND
-
Module ground wire
16
GND
-
Module ground wire
19
GND
-
Module ground wire
20
M0
Input (very weak
pull-up)
Work with M1 to decide 4 working modes of the module (cannot be left
floating; can be grounded if not used).
21
M1
Input (very weak
pull-up)
Work with M0 to decide 4 working modes of the module (cannot be left
floating; can be grounded if not used).
22
RXD
Input
TTL serial port input, connected to the external TXD output pin;
23
TXD
Output
TTL serial port output , connected to the external RXD input pin;
24
AUX
Output
Used to indicate the working status of the module;
For user to wakes up the external MCU and it outputs low level during
power-on self-check initialization; (can be left floating)
25
VCC
-
Module power supply positive reference, voltage range: 2.7 ~ 5.5VDC
26
GND
-
Module ground wire
4. Recommended Connection Diagram
