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ST7MC1 データシート(PDF) 276 Page - STMicroelectronics |
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ST7MC1 データシート(HTML) 276 Page - STMicroelectronics |
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276 / 308 page  ST7MC1/ST7MC2 276/308 MOTOR CONTROL CHARACTERISTICS (Cont’d) Figure 154. Example 5: Waveforms for sensor HST update timing diagram for a newly selected phase input fmtc fSCF Comparator output HST (MCRC) XX Sampling time sample write IS[1:0] = 01 = 2 x fcpu MCIx d 01 Sampling of sensor input is done at fSCF, so after writing IS[1:0] in the MPHST register for input selection, you have to wait: 1) 1/fmtc to resynchronize the data and set the MCIx bit 2) 100ns corresponding to the comparator & multiplexer propagation delay (d) 3) 1/fSCF to sample the comparator output 4) 1/fmtc to resynchronize the data and set the HST bit Example with fPERIPH = fmtc = 4MHz : SCF[1:0] 00 01 10 11 fSCF Secure waiting time to read HST 1MHz 500kHz 250kHz 125kHz 2µs 3µs 5µs 9µs IS[1:0] (MPHST) |
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