Software Writing - Ebyte E22-900M33S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

4.2 Software writing

This module is SX1268/SX1262+PA+LNA , and its driving method is completely the same as SX1268/SX1262 . Users can operate it
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accordingto the SX1268/SX1262 chip manual;It should be noted that the TX_EN of PA_EN and RF_switch are connected together,
and the RX_EN of LNA_EN and RF_switch are connected together, so users only need to control TX_EN when sending, and
use TX_EN when receiving.
DIO1 and DIO2 are general-purpose IO ports that can be configured into a variety of functions; DIO2 can be connected to
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TXEN, not connected to the IO port of the MCU, and is used to control radio frequency switch emission. For details, see the
SX1262 manual. If not used , it can be left floating;RX_EN and TX_EN cannot be high at the same time. The level states must
be opposite.
is used internally to power the 32MHz TCXO crystal oscillator ( DIO3 is configured to output 1.8V ) .
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E22-900M33S User Manual
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