ST7MC2M9 STMicroelectronics, ST7MC2M9 Datasheet - Page 277

• Manufacturer Part Number: ST7MC2M9
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
• Manufacturer: STMicroelectronics

Specifications of ST7MC2M9

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and by-pass for external clock, clock security system.
• Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

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