Chengdu Ebyte Electronic Technology Co., Ltd.
E32-433T20D User Manual
Copyright © 2012–20 22 , Chengdu Ebyte Electronic Technology Co., Ltd.
7
pin
number
pin name
Pin Orientation
pin usage
1
M0
Input (very weak
pull-up)
Cooperate with M1 to determine the 4 working modes of the module.
(Cannot
be left floating, can be grounded if not used)
2
M1
Input (very weak
pull-up)
Cooperate with M0 to determine 4 working modes of the module.
(Cannot be
left floating, can be grounded if not used)
3
RXD
enter
TTL serial port input, connected to the external TXD output pin;
Can be configured as open-drain or pull-up input, see parameter settings for
details.
4
TXD
output
TTL serial output, connected to external RXD input pin;
Can be configured as open-drain or push-pull output, see parameter settings
for details.
5
AUX
output
Used to indicate the working status of the module;
(can be left floating)
The user wakes up the external MCU, and outputs a low level during the
power-on self-test initialization;
It can be configured as open-drain output or push-pull output, see parameter
settings for details.
6
VCC
enter
Positive reference for module power supply, voltage range: 2.3 to 5.5 V DC
7
GND
enter
Module ground
8
fixing
hole
fixing hole
9
fixing
hole
fixing hole
10
fixing
hole
fixing hole
4 Recommended Wiring Diagram