ST STM32WL5 Series User Manual

Sub-GHz radio (SUBGHZ) RM0453
170/1461 RM0453 Rev 1
• Calibration mode
– intermediate mode between Deep-Sleep or Sleep, and Standby
– used to calibrate the sub-GHz radio RC 64 kHz, sub-GHz radio RC 13 MHz, RF-
PLL, RF-ADC and image
• Standby mode
– sub-GHz radio clocked by its internal RC 13 MHz clock
– HSE32 clock can be kept running (optional)
– data memory retained
• Active mode (FS, TX, RX)
– Frequency synthesis (FS) mode: RF-PLL switched on
– Transmit (TX) mode: the power amplifier (PA) ramped and data transmitted from
the data buffer according the selected modulation scheme
– Receive (RX) mode: sub-GHz radio looking for incoming data packets
The sub-GHz radio operating modes are shown in the figure below.
Figure 15. Sub-GHz radio operating modes
MSv62622V1
Active
Sleep
FS
TX
RX
POR and reset
Calibration
Standby
Startup
NSS or RF-RTC (cold)
NSS or RF-RTC (warm)
Calibration done
SetRx()
RxTimeout,
RxDone,
SetStandby()
TxTimeout,
TxDone
SetFs()
SetStandby()
SetFs()
SetTx()
SetRx()
SetSleep()
SetRx()
SetRx()
SetTx()
SetTx()
SetTx()
SetFs()

ST STM32WL5 Series Specifications

General

Brand	ST
Model	STM32WL5 Series
Category	Microcontrollers
Language	English