E32-Ttl-100S1 - Ebyte E32 Series User Manual

SX1278 Wireless Module

3.1.2 E32-TTL-100S1

Pin No. Pin item
1 M0
2 M1
3 RXD
4 TXD
5 AUX
6 VCC
7 GND
8 GND
9 ANT
10 GND
11 GND
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Pin direction
Input Work with M1 & decide the four operating modes.
（weak pull-up） Floating is not allowed, can be ground.
Input Work with M0 & decide the four operating modes.
（weak pull-up） Floating is not allowed, can be ground.
TTL UART inputs, connects to external (MCU, PC) TXD output pin.
Input
Can be configured as open-drain or pull-up input;
TTL UART outputs, connects to external RXD (MCU, PC) input pin.
Output
Can be configured as open-drain or push-pull output
To indicate module's working status
To wake up the external MCU, during the procedure of self-check initialization, the pin
outputs low level.
Output
Can be configured as open-drain output or push-pull output
Floating is allowed
Voltage reference of module
Input
Power supply 2.3V ~ 5.5V DC
Input Ground
Output Reference places of high frequency signal output
Output
Antenna interface（ high frequency signal output）
Input Ground
Ground
Input
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