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STM32WLE4JC 数据表(PDF) 70 Page - STMicroelectronics |
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STM32WLE4JC 数据表(HTML) 70 Page - STMicroelectronics |
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70 / 145 page  Electrical characteristics STM32WLE5/E4xx 70/145 DS13105 Rev 8 Table 29. Sub-GHz radio general specifications Symbol Description Conditions Min Typ Max Unit FR Frequency synthesizer range Low-power PA 150 - 960 MHz FSTEP Frequency synthesizer step High-resolution mode HSE / 2(2)(5) -095 - Hz PHN(1) (2) Synthesizer phase noise (868 to 915 MHz) 100 kHz offset - –100 - dBc/Hz 1 MHz offset - –120 - 10 MHz offset - –135 - TS_FS Synthesizer wakeup time From Standby, HSE32 mode - 40 - µs TS_HO P Synthesizer hop time 10 MHz step - 40 - TS_OS C Crystal oscillator wakeup time From Standby, RC(3) normal mode from HSE32 off -170 - OSC_ TRM Crystal oscillator trimming range for crystal frequency error compensation(4) Min/max XTAL specifications ±15 ±30 - ppm BR_F Bitrate, FSK Programmable (min modulation index is 0.5) 0.6 - 300(5) Kbit/s FDA Frequency deviation, FSK Programmable (FDA + BR_F/2 ≤ 250 kHz) 0.6 - 200 kHz BR_L Bitrate, LoRa Min for SF12, BW_L = 7.8 kHz Max for SF7, BW_L = 500 kHz 0.018 - 62.5(6) Kbit/s BW_L Signal BW, LoRa Programmable 7.8 - 500(6) kHz SF Spreading factor for LoRa Programmable, chips/symbol = 2SF 5- 12 - 1. Phase Noise specifications are given for the recommended PLL bandwidth to be used for the specific modulation/BR, optimized settings may be used for specific applications. 2. Phase Noise is not constant over frequency, due to the topology of the PLL. For two frequencies close to each other, the phase noise may change significantly 3. Wakeup time till crystal oscillator frequency is within ±10 ppm. 4. OSC_TRIM is the available trimming range to compensate for crystal initial frequency error and to allow crystal temperature compensation implementation. The total available trimming range is higher and allows the compensation for all device process variations 5. Maximum bit rate is assumed to scale with the RF frequency: for example 300 Kbit /s in the 869-to-915 MHz frequency band and only 50 Kbit/s at 150 MHz. 6. For RF frequencies below 400 MHz, there is a scaling between the frequency and supported bandwidth. Some bandwidths may not be available below 400 MHz. |
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