ST7FMC1K2TC STMICROELECTRONICS [STMicroelectronics], ST7FMC1K2TC Datasheet - Page 276

• Manufacturer Part Number: ST7FMC1K2TC
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST7MC1/ST7MC2
MOTOR CONTROL CHARACTERISTICS (Cont’d)
Figure 154. Example 5: Waveforms for sensor HST update timing diagram for a newly selected
phase input
276/308
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
HST (MCRC)
IS[1:0] (MPHST)
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
Sampling time