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3. Mechanical properties
No.
Name
1
GND
2
GND
3
GND
4
GND
5
M0
6
M1
7
RXD
8
TXD
9
AUX
10
VCC
11
GND
12
NC
13
GND
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Direction
-
Module ground
-
Module ground
-
Module ground
-
Module ground
Input (very weak
Cooperate with M1 to determine the 4 working modes of the module.
pull-up)
(Can not be suspended, if not used, it can be grounded)
Input (very weak
Cooperate with M0 to determine the 4 working modes of the module.
pull-up)
(Can not be suspended, if not used, it can be grounded)
Input
TTL serial port input, connected to the external TXD output pin;
Output
TTL serial port output, connected to the external RXD input pin;
Used to indicate the working status of the module; the user wakes up the
Output
external MCU, and outputs low level during power-on self-check
initialization; (can be left floating)
-
Module power supply positive reference, voltage range: 3~3.6V DC
-
Module ground
Reserved
（OCDSCK）
-
Module ground (GND)
E330-400T13S User Manual
Function
6
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