TMC428

The TMC428 is a miniaturized high performance stepper motor controller. It controls up to three 2-phase stepper motors. All motors can operate ependently. The TMC428 allows up to 6 bit micro step resolution which is up to 64 micro steps per full step individually selectable for each motor. Once initialized, it erforms all real time critical tasks autonomously based on target positions and velocities,which may be altered on-the-fly. So, an inexpensive micro controller together with the TMC428 forms a omplete motion control system. The micro controller is free to do application specific interfacing and high evel control unctions. Both, the communication with the micro controller and with one to three daisy hained stepper motor drivers take place via two separate 4 wire serial peripheral interfaces. The TMC428 irectly connects to SPI M* smart power stepper motor drivers.
`  Controls up to three 2-phase stepper motors
`  Serial 4-wire interface for µC with easy-to-use protocol
`  Configurable interface for SPI M motor drivers
`  Different types of SPI M stepper motor driver chips may by mixed within a single daisy chain
`  Communication on demand minimizes traffic to the SPI M stepper motor drivers chain
`  Programmable SPI TM ta rates up to 1 Mbit/s
`  Wide range for clock frequency can use CPU clock up to 16 MHz
`  Internal 24 bit wide position counters
`  Full step frequencies up to 20 kHz
`  Read-out facility for actual motion parameters (position, velocity, acceleration) and driver status
`  Individual micro step resolution of {64, 32, 16, 8, 4, 2, 1} micro steps via built-in sequencer
`  Programmable 6 bit micro step table with up to 64 entries for a quarter sine wave period
`  Built-in ramp generators for autonomous positioning and speed control
`  On-the-fly alteration of target motion parameters (like position, velocity, acceleration)
`  Automatic acceleration dependent current control (power boost)
`  Power down mode (100 µA) with transparent wake-up for normal operation (typical  5 mA @ 16 MHz)
`  3.3V or 5V operation with CMOS / TTL compatible IOs (all inputs Schmitt-Trigger)
`  Ultra small 16 pin SSOP package (optional 24 pin SOIC24 package)
`  Integrated power-on-reset