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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STM32WL55JC 데이터시트(PDF) 20 Page - STMicroelectronics |
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STM32WL55JC 데이터시트(HTML) 20 Page - STMicroelectronics |
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20 / 147 page  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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