Datasheet
TMC5041 DATASHEET (Rev. 1.13 / 2017-MAY-16) 74
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steep slopes when using a high clock frequency. The external clock input is enabled with the first
positive polarity seen on the CLK input.
Attention
Switching off the external clock frequency prevents the driver from operating normally. Therefore be
careful to switch off the motor drivers before switching off the clock (e.g. using the enable input),
because otherwise the chopper would stop and the motor current level could rise uncontrolled. The
short to GND detection stays active even without clock, if enabled.
17.3 Considerations on the Frequency
A higher frequency allows faster step rates, faster SPI operation and higher chopper frequencies. On
the other hand, it may cause more electromagnetic emission of the system and causes more power
dissipation in the TMC5041 digital core and voltage regulator. Generally a frequency of 10 MHz to 16
MHz should be sufficient for most applications. For reduced requirements concerning the motor
dynamics, a clock frequency of down to 8 MHz can be considered.