LLCC68 datasheet(69/111 Pages) SEMTECH

69 / 111 page

LLCC68

Data Sheet

Rev. 1.1

DS.LLCC68.W.APP

Dec 2024

69 of 111

Semtech

LLCC68

www.semtech.com

13.1.5 SetRx

The command SetRx() sets the device in receiver mode.

This command sets the chip in RX mode, waiting for the reception of one or several packets. The receiver mode operates with a timeout to

provide maximum flexibility to end users.

When the timeout is active (0x000000 < timeout < 0xFFFFFF), the radio stops the reception at the end of the timeout period unless a

preamble and Sync Word (in GFSK) or Header (in LoRa) has been detected. This is to ensure that a valid packet is not dropped in the middle

of the reception due to the pre-defined timeout. By default, the timer is stopped only if the Sync Word or header has been detected.

However, it is also possible to stop the timer upon preamble detection by using the command StopTimerOnPreamble(...).

Table 13-8: SetRx SPI Transaction

Byte

1-3

Data from host

Opcode = 0x82

timeout(23:0)

Table 13-9: SetRx Timeout Duration

Timeout(23:0)

Timeout Duration

0x000000

No timeout. Rx Single mode. The device stays in RX Mode until a reception occurs and the devices return in

STBY_RC mode upon completion

0xFFFFFF

Rx Continuous mode. The device remains in RX mode until the host sends a command to change the operation

mode. The device can receive several packets. Each time a packet is received, a packet done indication is given

to the host and the device automatically searches for a new packet.

Others

Timeout active. The device remains in RX mode, it returns automatically to STBY_RC mode on timer

end-of-count or when a packet has been received. As soon as a packet is detected, the timer is automatically

disabled to allow complete reception of the packet. The maximum timeout is then 262s.

LLCC68 Datasheet(PDF) 69 Page - Semtech Corporation