LLCC68 datasheet(70/111 Pages) SEMTECH

70 / 111 page

LLCC68

Data Sheet

Rev. 1.1

DS.LLCC68.W.APP

Dec 2024

70 of 111

Semtech

LLCC68

www.semtech.com

13.1.6 StopTimerOnPreamble

The command StopTimerOnPreamble(...) allows the user to select if the timer is stopped upon preamble detection of

Sync Word / header detection.

The enable byte definition is given in the following table.

By default, the timer is stopped only when the Sync Word (in GFSK) or Header (in LoRa) has been detected. When the function

StopTimerOnPreamble(...)

is used with the value enable at 0x01, then the timer stops upon preamble detection and the device stays

in RX mode until a packet is received. It is important to notice that stopping the timer upon preamble may cause the device to stay in Rx for

an unexpected long period of time in case of false detection.

Figure 13-1: Stopping Timer on Preamble or Header Detection

Table 13-10: StopTimerOnPreamble SPI Transaction

Byte

Data from host

Opcode = 0x9F

StopOnPreambleParam

Table 13-11: StopOnPreambleParam Definition

StopOnPreambleParam

Value

Description

disable

0x00

Timer is stopped upon Sync Word or Header detection

enable

0x01

Timer is stopped upon preamble detection

time

Radio Current

timeout

Radio in RX mode

Radio in STDBY_RC

Preamble Detected

SyncWord / Header Detected

Radio in RX mode

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