TMC429_16 Datasheet, PDF (56/83 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Intelligent Triple Stepper Motor Controller

TMC429 DATASHEET (Rev. 2.04 / 2015-JUN-03)
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configuration code words are read sequentially beginning with the first address of the driver chain
datagram configuration memory range. Each driver configuration code word selects a signal provided
by the microstep unit.
MICROSTEP TABLE
The second 32 addresses are provided to store the microstep table. This table usually is a quarter
period of a sine wave or of a periodic function, which has been optimized for a given motor type.
Different stepper motors may step with different microstep resolutions, but the microstep look up
table (LUT) is the same for all stepper motors controlled by one TMC429. Any quarter wave period
stored in the microstep table is expanded automatically to a full period wave together with its 90°
phase shifted wave.
NXM
The NxM bit tells the TMC429 that the last bit of a motor driver SPI register is reached. The TMC429
increments the internal stepper motor addressing counter and switches to the next driver in the chain
after reading an SPI configuration word with NxM=1. If the internal stepper motor addressing counter
is equivalent to the last stepper motor driver LSMD parameter, the datagram transmission is finished
and the counter is preset to %00 for the next datagram transmission to the stepper motor driver
chain.
The total data word width is six bit: five for an internal sequencer output signals and one NxM bit.
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