ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 138
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ST7MC2S6
Manufacturer Part Number
ST7MC2S6
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
Manufacturer
STMicroelectronics
Datasheet
1.ST7MC1K4.pdf
(309 pages)
Specifications of ST7MC2S6
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
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ST7MC1xx/ST7MC2xx
10.6 MOTOR CONTROLLER (MTC)
10.6.1 Introduction
The ST7 Motor Controller (MTC) can be seen as a
Three-Phase Pulse Width Modulator multiplexed
on six output channels and a Back Electromotive
Force (BEMF) zero-crossing detector for sensor-
less control of Permanent Magnet Direct Current
(PM BLDC) brushless motors.
The MTC is particularly suited to driving brushless
motors (either induction or permanent magnet
types) and supports operating modes like:
– Commutation step control with motor voltage
– Commutation step control with motor current
– Position Sensor or sensorless motor phase com-
– BEMF zero-crossing detection with high sensitiv-
– Realtime motor winding demagnetization detec-
– Automatic and programmable delay between
– PWM generation for three-phase sinewave or
138/309
1
regulation and current limitation
regulation, i.e. direct torque control
mutation control (six-step mode)
ity. The integrated phase voltage comparator is
directly referred to the full BEMF voltage without
any attenuation. A BEMF voltage down to
200 mV can be detected, providing high noise
immunity and self-commutated operation in a
large speed range.
tion for fine-tuning the phase voltage masking
time to be applied before BEMF monitoring.
BEMF zero-crossing detection and motor phase
commutation.
three-channel independent PWM signals.
Table 22. MTC Functional Blocks
Input Detection Block
Delay Manager
PWM Manager
Channel Manager
PWM Generator Block
Input Pins
Sensorless Mode
D Event detection
Z Event Detection
Demagnetization (D) Event
Z Event Generation (BEMF Zero Crossing)
Protection for ZH event detection
Position Sensor Mode
Sampling block
Commutation Noise Filter
Speed Sensor Mode
Tachogenerator Mode
Encoder Mode
Summary
Switched Mode
Autoswitched Mode
Debug Option
Checks and Controls for simulated events
Speed Measurement Mode
Summary
Voltage Mode
Over Current Handling in Voltage mode
Current Mode
Current Feedback Comparator
Current feedback amplifier
Measurement Window
MPHST Phase State Register
Emergency Feature
Dead Time Generator
Programmable Chopper
Main Features
Functional Description
Prescaler
PWM Operating mode
Repetition Down-Counter
PWM interrupt generation
Timer Re-synchronisation
PWM generator initialization and start-up
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