Datasheet

TMC2590 DATASHEET (V1.0 / 2019-FEB-22) 20

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Figure 7.2 shows the interfaces in a typical application. The SPI bus is driven by an embedded MCU to

initialize the control registers of both a motion controller and one or more motor drivers. STEP/DIR

interfaces are used between the motion controller and the motor drivers.

7.4 Register Write Commands

An SPI bus transaction to the TMC2590 is a write command to one of the five write-only registers that

hold configuration parameters and mode bits:

Description

Driver Control Register

(DRVCTRL)

The DRVCTRL register has different formats for controlling the

interface to the motion controller depending on whether or

not the STEP/DIR interface is enabled.

Chopper Configuration Register

(CHOPCONF)

The CHOPCONF register holds chopper parameters and mode

bits.

CoolStep Configuration Register

(SMARTEN)

The SMARTEN register holds CoolStep parameters and a mode

bit. (smartEnergy is an earlier name for CoolStep.)

StallGuard2 Configuration Register

(SGCSCONF)

The SGCSCONF register holds StallGuard2 parameters and a

mode bit.

Driver Configuration Register

(DRVCONF)

The DRVCONF register holds parameters and mode bits used to

control the power MOSFETs and the protection circuitry. It also

holds the SDOFF bit which controls the STEP/DIR interface and

the RDSEL parameter which controls the contents of the

response returned in an SPI transaction

In the following sections, multibit binary values are prefixed with a % sign, for example %0111.