Ebyte E51 Series User Manual

Contents

Ebyte E51 Series User Manual Manual pdf 11 page image

AX5043 Wireless Module User Manual of E51 Series ModulesCopyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 11 / 213.3.2 Pin DefinitionPin No. Pin item Pin direction Pin application1 M0Input（weak pull-up）Work with M1 & decide the four operating modes.Floating is not allowed, can be ground.2 M1Input（weak pull-up）Work with M0 & decide the four operating modes.Floating is not allowed, can be ground.3 RXD InputTTL UART inputs, connects to external (MCU, PC) TXD output pin. Can beconfigured as open-drain or pull-up input.4 TXD OutputTTL UART outputs, connects to external RXD (MCU, PC) input pin. Can beconfigured as open-drain or push-pull output.5 AUX OutputTo indicate module’s working status & wakes up the external MCU. Duringthe procedure of self-check initialization, the pin outputs low level. Can beconfigured as open-drain output or push-pull output. (Floating is allowed).6 VCC Input Power supply 4.75V-5.25V DC7 GND Input Ground electrode8 Fixing hole Fixing hole9 Fixing hole Fixing hole10 Fixing hole Fixing hole4. Recommended Circuit DiagramNo. Description（STM8L MCU）1 The UART module is TTL level. Please connect to MCU of TTL level.2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.