The TMC429 connects to the recent coolStep drivers (TMC260, TMC262 and TMC389) via Step- & Direction signals or to the classic TRINAMIC drivers TMC236, TMC239, TMC246 and TMC249 via SPI. The communication with the host microcontroller is performed with an extra SPI interface. The host just needs to do high-level control tasks, e.g. giving the command: Drive motor 2 to position 1000. The TMC429 automatically calculates the motion ramp based on velocity and acceleration parameters.
The main features then are: this is a miniaturised low cost 3 axes motor controller, it is high-performance micro stepper, has SPI host interface with easy-to-use protocol, step/direction or SPI driver interface and on-the-fly alteration of position set point, velocity and acceleration. In addition different types of SPI stepper motor driver chips may by mixed within a single daisy chain and communication on demand minimizes traffic to the SPI stepper motor drivers chain. It allows read-out of driver status information (current motion parameters eg. position, velocity, acceleration) and programmable 6 bit micro step table with up to 64 entries for a quarter sine wave period (SPI mode).
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