TMC428 is obsolete and not recommended for new designs. * Controls up to three 2-phase stepper motors * Serial 4-wire interface for µC with easy-to-use protocol * Configurable interface for SPITM motor drivers * Different types of SPITM stepper motor driver chips may be mixed within a single daisy chain * Communication on demand minimizes traffic to the SPITM stepper motor driver chain * Programmable SPITM data 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