ST STM32WL55JC Reference Manual page 452

Advanced arm-based 32-bit mcus with sub-ghz radio solution
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Peripherals interconnect matrix
12.3.14
From timer (LPTIM3) to sub-GHz radio SPI NSS
Purpose
Low-power timer LPTIM3 can be used to generate a sub-GHz radio SPI NSS event.
Triggering signals
The output from low-power timer is on signal LPTIM3_OUT event.
The connection between timers and sub-GHz radio SPI NSS is provided in
SPI control register
Active power modes
Run, Sleep, LPRun, LPSleep
452/1454
(PWR_SUBGHZSPICR).
RM0453 Rev 2
RM0453
PWR sub-GHz

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