Programming - Ebyte E220-400M22S User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd.
The antenna installation structure has a great influence on the module performance, so it is necessary to ensure that

the antenna is exposed, preferably vertically upward. When the module is installed inside the housing, the
high-quality antenna extension line can be used to extend the antenna to the outside of the housing;
The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.

It is suggested to add 200R protection resistance in RXD / TXD of external MCU.


4.2 Programming

This module is llcc68 + peripheral circuit, users can operate according to llcc68 chip manual completely;

Dio1, dio2 and DIO3 are common IO ports, which can be configured into multiple functions. Dio2 can be connected

to TXEN, not to IO port of MCU, and is used to control RF switch emission. See llcc68 manual for details, and can
be suspended if not used;
The internal use of 32mhz passive crystal oscillator, without pin control, software program control can be;

The differences between llcc68 and sx1262 / sx1268 were as follows

1. Sx1262 / sx1268 supports spread spectrum factors sF5, SF6, sf7, SF8, Sf9, SF10, SF11 and SF12;
Llcc68 supports spread spectrum factors sF5, SF6, sf7, SF8, Sf9, SF10 and SF11.
2. Llcc68 can set the spread spectrum factor and receive bandwidth:
LoRa® Rx/Tx, BW = 125 – 250 – 500 kHz
LoRa®，SF = 5 - 6 - 7 - 8 - 9 for BW = 125 kHz ，
LoRa®，SF = 5 - 6 - 7 - 8 - 9 - 10 for BW = 250 kHz ，
LoRa®，SF = 5 - 6 - 7 - 8 - 9 - 10 - 11 for BW = 500 kHz；
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
E220-400M22S User Manual
9