The RF frequency range for the STM32WLEx2 is specified starting at 150MHz. Our requirement is to work between 148MHz and 152MHz ( the wildlife tracking frequency allocation) - will the device work at 148MHz? (NonLora application)

[JNoci.1]

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[Uwe Bonnes]

Semiconductors normally have no hard but soft limits. Expect some lower figure of merits like higher current surge, less max TX porer and less RX sensivity. Hard limits may be imposed by internal logic. Maybe with normal frequency settings, the range for the PLL may not allow to set below 150 MHz. That you could perhaps be worked around by using a slight lower base frequency oscillator that would shift that limit.