2020年8月19日 (三) 15:35的版本

1 Overview

• SX1262: （+22dBm）, 150-960 MHz (e.g. 430/490MHz, 868/915MHz), Rx Current 4.6mA, QFN 4x4mm
• SX1261: （+15dBm）, 150-960 MHz (e.g. 430/490MHz, 868/915MHz), Rx Current 4.6mA, QFN 4x4mm
• SX1268: （+22dBm）, 410-810 MHz, Rx Current 4.6mA, QFN 4x4mm

• 4.2 mA of active receive current consumption
• 25 mA TX @ 14dbm
• Programmable bit rate up to 62.5 kbps LoRa and 300 kbps FSK
• High sensitivity: down to -148 dBm

https://www.semtech.com/products/wireless-rf/lora-transceivers/sx1262

2 Notes

2.1 Busy Ctrl Line

Used to indicate the status of the internal state machine.

The amount of time the BUSY line is stay HIGH.

When the BUSY line is held low, it indicates that the internal state machine is in idle mode and that the radio is ready to accept a command from the host controller.

The BUSY line is set back to zero once the chip has reached a stable mode and it's ready for a new command

2.2 RF Switch

• DIO2 控制 RF Switch 之 ctrl，用于切换 RF1 (RF_OUT) 还是 RF2 (RF_IN) 连接到 RFC (ANT)

对于 RF switch PE4259:

• Pin 6 (~CTRL) = VDD (3.3V Max), Pin 4 (CTRL) = High ------> RF1 (Pin1) -> RFC
• Pin 6 (~CTRL) = VDD (3.3V Max), Pin 4 (CTRL) = Low ------> RF3 (Pin2) -> RFC

3 Pinmap

4 Module Pinmap

5 Reference

• LoRa
• LoRaWAN
• SX127x
• ASR650x

• https://www.semtech.com/products/wireless-rf/lora-transceivers/sx1262