Ebyte E34-2G4H27D, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd E34-2G4H27D User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd
5
3 Size and pin definition
NO Pin Pin direction Pin application
1
M0
Input
（
weak pull-up
）
Work with M1 & decide the four operating modes.
Floating is not allowed, can be ground.
2
M1
Input
（
weak pull-up
）
Work with M0 & decide the four operating modes.
Floating is not allowed, can be ground.
3
RXD Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
4
TXD Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output
5
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 ).
6 VCC Power supply 3.3V-5.5V DC
7 GND Input Ground
8
Fixing hole Input Fixing hole
9
Fixing hole Fixing hole
10 Fixing hole Fixing hole