Ebyte E22-900M30S User Manual

Also see for E22-400T30S: User manual User manual User manual User manual User manual

Contents

Ebyte E22-900M30S User Manual Manual pdf 5 page image

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900M30S User manualCopyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd. 4No. Name Direction Function1 GND - Ground wire, connected to the power reference ground2 GND - Ground wire, connected to the power reference ground3 GND - Ground wire, connected to the power reference ground4 GND - Ground wire, connected to the power reference ground5 GND - Ground wire, connected to the power reference ground6 RXEN Input RF switch receiving control pin, connected to external microcontroller IO,valid in high level7 TXEN Input RF switch transmitting control pin, connected to external microcontroller IOor DIO2, valid in high level8 DIO2 Input/Output Configurable universal IO port (see SX1262 manual for details)9 VCC - Power supply, 2.5~5.5V(It is recommended to add external ceramic filtercapacitor)10 VCC - Power supply, 2.5~5.5V(It is recommended to add external ceramic filtercapacitor)11 GND - Ground wire, connected to the power reference ground12 GND - Ground wire, connected to the power reference ground13 DIO1 Input/Output Configurable universal IO port (see SX1262 manual for details)14 BUSY Output For status indication (see SX1262 manual for details)15 NRST Input Chip reset trigger input pin, valid in low level16 MISO Output SPI data output pin17 MOSI Input SPI data output pin18 SCK Input SPI data output pin19 NSS Input Module chip select pin for starting an SPI communication20 GND - Ground wire, connected to the power reference ground21 ANT - Antenna interface, stamp hole (50 ohm characteristic impedance)22 GND - Ground wire, connected to the power reference ground4. Basic Operation4.1 Hardware Designl It is recommended to use DC stabilized power supply to supply power to the module. The power supply ripplecoefficient is as small as possible, and the module needs to be reliably grounded.l Please pay attention to the correct connection of the positive and negative poles of the power supply. If the reverseconnection is connected, the module may be permanently damaged.l Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,the module will be permanently damaged.l Please check the stability of the power supply, the voltage can not be significantly frequent.l When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of themargin, and the whole machine is beneficial for long-term stable operation.