TMC429-I

The TMC429-I is a miniaturized Stepper Motor Controller with an industry leading feature set. It controls up to three motors via SPI or step/direction interface. The SPI interface provides a programmable 6-bit microstep table (64µsteps/full step) for best step accuracy with 2-phase stepper motors. Based on target positions and velocities - which can be altered on the fly - it performs all real time critical tasks autonomously. The TMC429 offers high level control functions for robust and reliable operation. Two separate 4 wire serial peripheral interfaces allow for communication with the microcontroller and with up to three daisy chained stepper motor drivers. Together with a microcontroller the TMC429 forms a complete motion control system. High integration and small form factor allow for miniaturized designs for highly competitive solutions.

• Controls up to three stepper motors
• Serial 4-wire interface for µC with easy-to-use protocol
• Interface for SPI™ motor drivers with data rates up to 1Mbps
• Step/direction interface
• Internal position counters 24-bit wide
• Microstep frequency up to 1MHz
• Read-out option for all motion parameters
• Programmable 6 bit microstep table, up to 64 entries for a quarter sine wave period
• Ramp generators for autonomous positioning/speed control
• On-the-fly change of target motion parameters
• Power boost automatic acceleration dependent current control
• Up to 32MHz (can use CPU clock) Clock frequency
• 1.25mA at 4MHz Typical low power operation