Features: Supports 3-phase as well as 2-phase brushless motors
Performs trajectory generation, servo loop closure, and commutation
Ultra-smooth sinusoidal commutation
Open or closed loop operation
Software and feature-compatible with other 1st generation PMD chipsets
Available in 1 or 2 axis configurations
32-bit position, velocity, acceleration and jerk trajectory profile registers
Choice of S-curve, trapezoidal, or contoured velocity profile modes
Electronic Gearing
Two travel-limit switches per axis
Choice of PWM or DAC motor output signals
Easy-to-use packet-oriented command protocol
Pinout
Specifications
Storage Temperature, Ts.....................-55 deg. C to +150 deg. C
Supply Voltage, Vcc.............................-0.3 V to +7.0 V
Power Dissipation, Pd..........................650 mW (I/O and CP combined)
Description The MC1231A is a dedicated motion processor which functions as a complete chip-based motor controller.Packaged in a 2-IC chipset, this device performs trajectory generation, servo loop closure, and sinusoidal commutation. The chipset inputs incremental encoder signals and outputs PWM or DAC-compatible motor command signals. The MC1231A is available in a one, or a two-axis configuration.
The MC1231A is functionally similar to other members of PMD's 1st generation chipset family however it adds the ability to perform sinusoidal commutation of brushless motors. All of MC1231A provides sophisticated motion control capabilities allowing the creation of complex profile sequences with very low tracking errors.
Both two and three-phase brushless motors are supported by the MC1231A. When used with two-phase brushless motors each phase is separated by 90 degrees. When used with 3-phase brushless motors each phase is separated by 120 degress. The commutation angle is continuously calculated using the encoder position. User-programmable commutation parameters allow a very wide range of encoders and motors to be controlled.
The chipset of MC1231A is controlled by a host processor which interfaces with the chipset via an 8-bit, bi-directional port. Communications to/from the chipset consist of packet-oriented messages.
The chipset of MC1231A is packaged in 2 68-pin PLCC packages. Both chips utilize CMOS technology and are powered by 5 volts.
MC1231A Data Sheet
