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EVAL6482H

Question asked by calic.caba on Apr 11, 2013
Latest reply on Apr 29, 2013 by Enrico Poli
I am trying to use the evaluation board for the L6482 driver chip in StepClock mode, but I have been unable to move the motor. The status word is reported as 0xE503, indicating an UVLO condition. A second read of the status register returns the same value, indicating the condition is persistent and not power-up reset related.
 CONFIG word is set to 0x2C98, and the board voltages are as follows:
VS=24.28V
VCC=7.52V
VREG=3.37V
VDD=5.03V (supplied from an external microcontroller board)
VBOOT=30.24V

Question #2: What TVAL register controls the motor current in StepClock mode?
Is it TVAL_RUN?

Question #3: How are OCD_TH settings in [mV] related to the actual current limit in mA?
Is it OCD_TH [mV] = current_limit [mA] x Rsense [ohm]?

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