Ebyte E32-900T20D - Size and Pin Definition

Chengdu Ebyte Electronic Technology Co., Ltd E32-900T20D User Manual
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3 Size and pin definition
No.
Name
Direction
Function
1
M0
Input
（weak pull-up）
With M1, the four working modes of the module can be determined (it
cannot be suspended, and it can be grounded if it is not used).
2
M1
Input
（weak pull-up）
With M0, the four working modes of the module can be determined (it
cannot be suspended, and it can be grounded if it is not used).
3
RXD
Input
TTL UART input ,Connect to external TXD output pins; Can be configured
as drain open circuit or pull up input, see parameter Settings
4
TXD
Output
TTL UART output, Connect to external RXD input pin; Can be configured as
drain open circuit or push - pull output, see parameter Settings
5
AUX
Output
Used to indicate the working status of the module; The user wakes up the
external MCU and outputs low level during self-test initialization; Can be
configured as drain open output, or push-pull output, see parameter Settings
(can be suspended)
6
VCC
Input
Positive reference of module power supply, voltage range: 2.3v ~ 5.5V DC
7
GND
Input
Ground