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STM32WL55JC Datasheet(PDF) 20 Page - STMicroelectronics

Part # STM32WL55JC
Description  Multiprotocol LPWAN dual core 32-bit Arm® Cortex®-M4/M0 LoRa®, (G)FSK, (G)MSK, BPSK, up to 256KB Flash, 64KB SRAM
PDF  147 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32WL55JC Datasheet(HTML) 20 Page - STMicroelectronics

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Functional overview
STM32WL55/54xx
20/147
DS13293 Rev 2
The block diagram of the sub-GHz radio system is shown in the figure below.
Figure 2. Sub-GHz radio system block diagram
3.9.3
Transmitter
The transmit chain comprises the modulated output from the modem, that directly
modulates the RF-PLL. An optional pre-filtering of the bit stream can be enabled to reduce
the power in the adjacent channel also dependent on the selected modulation scheme. The
modulated signal from the RF-PLL directly drives the high output power PA (HP PA) or low
output power PA (LP PA). The transmitted packet payload size depends on the modulation
scheme.
Transmitter high output power
Transmit high output power up to + 22 dBm, is supported through the RFO_HP RF pin.
MSv62614V1
Sub-GHz radio
Sub-GHz
RF frontend
Radio
control
SUBGHZSPI
hse32
Interrups
RFO_LP
RFO_HP
RFI_P
RFI_N
FSK
modem
LoRa
modem
(note)
Data
and
control
HSE32
OSC_IN
OSC_OUT
BUSY
HSERDY
HSEON
HSEBYPPWR
Note: LoRa modem is only available on STM32WL55xx devices.
VR_PA
VDDPA
PB0_VDDTCXO



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