Ebyte E220-400MM22S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E220-400MM22S User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd.
1 VCC -
Power supply, range 1.8V~3.7V (recommended to add external ceramic
filter capacitor)
2 GND - Ground wire, connected to the power reference ground
3 NRST Input Chip reset trigger input pin, active low
4 NC - -
5 NC - -
6 ANT - RF interface, stamp hole
7 GND - Ground wire, connected to the power reference ground
8 NC - -
9 TXEN Input
RF switch launch control pin, connected to external microcontroller IO
or DIO2, active high
10 RXEN Input
RF switch receiving control pin, connected to external microcontroller
IO, active high
11 BUSY Output Used for status indication (see LLCC68 manual for details)
12 MISO Output SPI data output pin
13 MOSI Input SPI data input pin
14 NSS Input Module chip select pin for starting an SPI communication
15 SCK Input SPI clock input pin
16 GND - Ground wire, connected to the power reference ground
17 NC - -
18 DIO3 Input/Output Configurable general-purpose IO port (see LLCC68 manual for details)
19 DIO2 Input/Output Configurable general-purpose IO port (see LLCC68 manual for details)
20 DIO1 Input/Output Configurable general-purpose IO port (see LLCC68 manual for details)
For the pin definition, software driver and communication protocol of the module, please refer to the official
LLCC68 Datasheet of SEMTECH
4 Basic Operation
4.1 Hardware Design

It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible and
the module needs to be reliably grounded;

Please pay attention to the correct connection of the positive and negative poles of the power supply,
reverse connection may cause permanent damage to the module;

Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,
the module will be permanently damaged;

Please check the stability of the power supply. Voltage can not fluctuate greatly and frequently;

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
margin, so the whole machine is beneficial for long-term stable operation;

The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other
parts with large electromagnetic interference;