STSPIN32F0 Datasheet, PDF (27/40 Pages) STMicroelectronics – Three-phase gate drivers

STSPIN32F0
Device description
6.6.3
High-speed external clock source
The high-speed external (HSE) clock can be generated from the external clock signal or
supplied with a 4 to 32 MHz crystal/ceramic resonator oscillator (see Figure 13).
The external clock signal has to respect the I/O characteristics and follows the
recommended clock input waveform (refer to Figure 12).
Figure 12. HSE clock source timing diagram
Figure 13. Typical application with 8 MHz crystal


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In the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. The R_EXT value depends on the crystal characteristics (refer to the crystal resonator
manufacturer for more details on them).
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