ST7FMC1K2B3 STMICROELECTRONICS [STMicroelectronics], ST7FMC1K2B3 Datasheet - Page 277
ST7FMC1K2B3
Manufacturer Part Number
ST7FMC1K2B3
Description
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST7FMC1K2B3.pdf
(309 pages)
- Current page: 277 of 309
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MOTOR CONTROL CHARACTERISTICS (Cont’d)
Figure 154. Example 5: Waveforms for sensor HST update timing diagram for a newly selected
phase input
Sampling of sensor input is done at f
for input selection, you have to wait:
1) 1/f
2) 100ns corresponding to the comparator & multiplexer propagation delay (d)
3) 1/f
4) 1/fmtc to resynchronize the data and set the HST bit
Example with f
Secure
waiting
time
to read HST
SCF[1:0]
f
SCF
MCIx
f
f
Comparator
output
sample
write IS[1:0] = 01
IS[1:0] (MPHST)
HST (MCRC)
mtc
SCF
mtc
SCF
= 2 x fcpu
to resynchronize the data and set the MCIx bit
to sample the comparator output
PERIPH
1MHz 500kHz 250kHz 125kHz
00
2µs
= f
mtc
3µs
01
XX
= 4MHz :
d
5µs
10
SCF
, so after writing IS[1:0] in the MPHST register
9µs
11
01
ST7MC1xx/ST7MC2xx
Sampling time
277/309
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