MC1141A

The MC1241A is a dedicated motion processor which functions as a complete chip-based stepper motor controller. Packaged in  a 2-IC chipset, this device performs trajectory profile generation and microstepping signal generation. The chipset outputs PWM or DAC-compatible motor command signals which directly drive the windings of the stepping motor, eliminating the need for external microstepping circuitry.  The MC1241A also provides the ability to input incremental encoder signals. It is available in a one, or a two-axis configuration.

The MC1241A is functionally similar to other members of PMD's 1st Generation Motion Processor Family however it adds the ability to perform micrstepping signal generation. All of these devices provide sophisticated trajectory generation allowing the creation of complex motion sequences.

Both two and three-phase stepping motors are supported by the MC1241A. An internal ROM-based lookup table is used to generate the microstepping waveforms. The motor power level can be controlled with a resolution of 16 bits. Changes to the motor power level can be coordinated with other profile changes to optimize motor heat dissipation under different load and acceleration conditions.

The chipset 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 is packaged in 2 68-pin PLCC packages. Both chips utilize CMOS technology and are powered by 5 volts.