The TMC428 is a miniaturized low cost, but high performance stepper motor controller for up to three motors. It integrates all real time critical tasks in reliable, dedicated hardware: An integrated motion ramp profile generator as well as an adaptable microstep sequencer with microstep RAM table. Advanced stop- and reference switch handling allows for precise and fast referencing as well as on-the-fly position checking. Automatic motor current control gives high motor dynamics while saving energy. The interrupt output can generate precise position pulses.

The TMC428 connects to the TRINAMICs SPI? drivers (TMC236,TMC239,TMC246 and TMC249) or to Step-/direction drivers. A second SPI? interface allows communication with a host microcontroller. The host microcontroller just needs to do high-level control tasks, e.g. giving the command: Drive motor 2 to position 1000. The TMC428 then automatically calculates the motion ramp based on velocity and acceleration parameters.
The TMC423 adds encoder functionality as well as step- direction impulse forming to the TMC428.?Evaluation Boards, application notes, spreadsheets for parameter calculation, C code examples and schematics are available in order to support short design-in times.

TMC 428 - The small but intelligent Controller:

• Miniaturized low-cost 3 axes motor controller
• High-performance micro stepping
• SPI interface with easy-to-use protocol
• On-the-fly alteration of position set point