SX1232
WIRELESS & SENSING
3.7. Timeout Function
DATASHEET
The SX1232 includes a Timeout function, which allows it to automatically shut-down the receiver after a receive sequence
and therefore save energy.
Timeout interrupt is generated TimeoutRxRssi x 16 x Tbit after switching to Rx mode if the Rssi flag does not raise
within this time frame (RssiValue > RssiThreshold)
Timeout interrupt is generated TimeoutRxPreamble x 16 x Tbit after switching to Rx mode if the PreambleDetect flag
does not raise within this time frame
Timeout interrupt is generated TimeoutSignalSync x 16 x Tbit after switching to Rx mode if the SyncAddress flag does
not raise within this time frame
This timeout interrupt can be used to warn the companion processor to shut down the receiver and return to a lower power
mode. To become active, these timeouts must also be enabled by setting the correct RxTrigger parameters in
RegRxConfig:
Table 19 RxTrigger Settings to Enable Timeout Interrupts
Receiver
Triggering Event
RxTrigger
(2:0)
Timeout on
Rssi
Timeout on
Preamble
Timeout on
SyncAddress
None
Rssi Interrupt
000
001
110
111
Off
Active
Off
Off
Off
Active
PreambleDetect
Active
Active
Rssi Interrupt & PreambleDetect
Active
Rev 3 - August 2012
Page 37
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
