ST7MC2M9 STMicroelectronics, ST7MC2M9 Datasheet - Page 144

• 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

ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
Finally, the PWM modulated voltage generated by
the power stage is smoothed by the motor induct-
ance to get sinusoidal currents in the stator wind-
ings.
The induction motor being asynchronous, there is
no need to synchronize the rotor position to the
sinewave generation phase in most of the applica-
tions.
Part of the MTC dedicated to delay computation
and event sampling can thus be reconfigured to
Figure 75. Complementary PWM generation for three-phase induction motor (1 phase represented)
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1
register processing
Compare preload
PWM generator
counter
Dead time
insertion
U event
PWM Ref
Signal
MCP0
MCPU
MCO1
MCO0
perform speed acquisition of the most common
speed sensor, without the need of an additional
standard timer.
This speed measurement timer with clear-on-cap-
ture and clock prescaler auto-setting allows to
keep the CPU load to a minimum level while taking
benefit of the embedded input comparator and
edge detector.