Ebyte E43-900T13S3, User Manual

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Chengdu Ebyte Electronic Technology Co., Ltd. E43-900T13S3 User manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co., Ltd.
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3. Size and pin definition
No. Name Direction Function
1 GND Ground wire
2 GND Ground wire
3 GND Ground wire
4 GND Ground wire
5 M0
Input （ weak pull-up ）
Work with M1 & decide the four operating modes.
Floating is not allowed, can be ground.
6 M1 Input （ weak pull-up ）
Work with M0 & decide the four operating modes.
Floating is not allowed, can be ground.
7 RXD Input
TTL UART inputs, connects to external TXD output pin. Can be configured
as open-drain or pull-up input. See details in parameters setting.
8 TXD Output
TTL UART outputs, connects to external RXD input pin. Can be configured
as open-drain or push-pull output. See details in parameters setting.
9 AUX Output
To indicate module’s working status & wakes up the external MCU.
During the procedure of self-check initialization, the pin outputs low
level. Can be configured as open-drain output or push-pull output
(floating is allowed).
10 VCC Power supply reference: 2.3V~5.5V DC
11 GND Ground wire
12 NC
13 GND Ground wire
14 NC
15 NC
16 NC