st7pmc2s6 STMicroelectronics, st7pmc2s6 Datasheet - Page 243

• Manufacturer Part Number: st7pmc2s6
• Description: 8-bit Mcu For Automotive With Nested Interrupts, Flash, 10-bit Adc, Brushless Motor Control, 5 Timers, Spi, Linsci?
• Manufacturer: STMicroelectronics

ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto
Note:
The multiplexer directs the PWM to the upper channel, the lower channel or both of them
alternatively or simultaneously according to the peripheral state.
This means that the PWM can affect any of the upper or lower channels allowing the
selection of the most appropriate reference potential when free-wheeling the motor in order
to:
The OS[2:0] bits in the MCRB register allow the PWM configuration to be configured for
each case as shown in
During demagnetization, the OS2 bit is used to control PWM mode, and it is latched in a
preload register so it can be modified when a commutation event occurs and the
configuration is active immediately.
The OS1 bit is used to control the PWM between the D and Z events to control back EMF
detection.
OS0 bit allows control of the PWM signal between the Z event and the next C event.
Demagnetization speed-up: During demagnetization the voltage on the winding has to be
as high as possible in order to reduce the demagnetization time. Software can apply a
different PWM configuration on the outputs between the C and D events, to force the free
wheeling on the appropriate diodes to maximize the demagnetization voltage.
Emergency feature
When the NMCES pin goes low:
This bit can be connected to an alarm signal from the drivers, thermal sensor or any other
security component.
This feature functions even if the MCU oscillator is off.
improve system efficiency
speed up the demagnetization phase
enable back EMF zero crossing detection
The tristate output buffer is put in reset state asynchronously.
The MOE bit in the MCRA register is reset.
An interrupt request is sent to the CPU if the EIM bit in the MIMR register is set.
Figure 111
and
Figure
110.
On-chip peripherals
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