ATAVRMC320 Atmel, ATAVRMC320 Datasheet - Page 6

• Manufacturer Part Number: ATAVRMC320
• Description: KIT EVAL MOTOR CTRL CAN/LIN
• Manufacturer: Atmel
• Series: AVR®r

Specifications of ATAVRMC320

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATmega32M1
• Primary Attributes: 3-Ph BLDC, Brushed DC, Stepper Motor- Controller Board
• Secondary Attributes: Includes ATAVRMC300 Power Driver Board
• Processor To Be Evaluated: ATmega32M1
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.2 MS_ALIGN phase
3.3 RAMP_UP phase
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AVR172
The ALIGN phase forces the motor at a specific position. The time of this phase is
controlled with ALIGN_TIME constant which is the ru_period_counter initial value
(200 for MC310 motor).
The ramp-up charateristics (duty-cycles and times) are stored in two tables:
These two tables are specific to the motor and the application.
The scanning of the step sequences and the monitoring of the step length are
achieved thanks to three independant counters :
- ru_step_length_cntr : which counts the commutation time (up to ru_step_length
variable)
- ru_period_counter : which counts the step length (up to RAMP_UP_PERIOD
constant)
The figure below provides a waveform of steps timing :
Figure 3. Steps timing
• ramp_up_duty_table[] : which provides the duty_cycle of the step
• ramp_up_time_table[] : which provides the length of the step (ru_step_length)
- ramp_up_index : which counts the step numbers (up to
RAMP_UP_INDEX_MAX constant)
8306B-AVR-05/10