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LLCC68 bảng dữ liệu(PDF) 104 Page - Semtech Corporation

tên linh kiện LLCC68
Giải thích chi tiết về linh kiện  Long Range, Low Power, sub-GHz RF Transceiver
PDF  111 Pages
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
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LLCC68 bảng dữ liệu(HTML) 104 Page - Semtech Corporation

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LLCC68
Data Sheet
Rev. 1.1
DS.LLCC68.W.APP
Dec 2024
104 of 111
Semtech
LLCC68
www.semtech.com
15.3 Implicit Header Mode Timeout Behavior
15.3.1 Description
When receiving LoRa packets in Rx mode with Timeout active, and no header (Implicit Mode), the timer responsible for generating the
Timeout (based on the RTC timer) is not stopped on RxDone event. Therefore, it may trigger an unexpected timeout in any subsequent mode
where the RTC isn’t re-invoked, and therefore reset and re-programmed.
15.3.2 Workaround
It is advised to add the following commands after ANY Rx with Timeout active sequence, which stop the RTC and clear the timeout event, if
any. The register at address 0x0902 is used to stop the counter, while the register at address 0x0944 clears the potential event.
The following pseudo-code can be used as a reference to implement the fix:
15.4 Optimizing the Inverted IQ Operation
15.4.1 Description
When exchanging LoRa packets with inverted IQ polarity, some packet losses may be observed for longer packets.
15.4.2 Workaround
Bit 2 at address 0x0736 must be set to:
• “0” when using inverted IQ polarity (see the SetPacketParam(...) command)
• “1” when using standard IQ polarity
The following pseudo-code can be used as a reference to implement the fix:



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