Chengdu Ebyte Electronic Technology Co,;Ltd
E32-433T33S user manual
Copyright ©2012–2022
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
5
3 Size and pin definition
No.
Name
Direction
Function
1
GND
Input
Module ground
2
VCC
Input
Power supply
：
3.3~ 5.5V DC
3
AUX
Output
Used to indicate the working status of the module; the user wakes up the
external MCU, and the Output is low during the power-on self-test
initialization Level; (can be left floating)
4
TXD
Output
TTL serial port output
，
connect to external RXD Input pin
；
5
RXD
Input
TTL serial port input, connect to external TXD output pin
6
M1
Input
（
weak
pull-up
）
work with M0, to define 4 working mode(not floated,connect to ground
when not using )
7
M0
Input
（
weak
pull-up
）
work with M1, to define 4 working mode(not floated,connect to ground
when not using )
11
ANT
Output
Antenna, 50ohm impedance
12
GND
-
fixed orifice
13
GND
-
fixed orifice
14
GND
-
fixed orifice
18
PB0
Input/Output
NC pins for future development, no need to connect
19
PB1
Input/Output
NC pins for future development, no need to connect
20
PB3
Input/Output
NC pins for future development, no need to connect
21
+3.3V
Input
Power pin when loading program(floated, no need to connect)
22
SWIM
Input
SWIM pin when loading program(floated, no need to connect)
23
GND
Input
Ground pin when loading program(floated, no need to connect)
24
RESET
Input
Reset pin when loading program(floated, no need to connect)
