Problem for EVAL6482H

ywliao · ‎2014-07-22

Posted on July 22, 2014 at 21:47

I have used EVAL6482H board to drive a stepper motor with a spec as followed,

Operating voltage: 2.5v

Rated current/ phase: 0.49A

Supply voltage: 20v

I set the parameter as followed

Stepper.setParam(TVAL_HOLD, 0x02);

Stepper.setParam(TVAL_RUN, 0x02);

Stepper.setParam(OCD_TH, 0x08);

Stepper.setParam(CONFIG, 0xF788);

Stepper.setParam(GATECFG1, 0xC7);

Stepper.setParam(GATECFG2, 0x61);

Stepper.setParam(T_FAST, 0x47);

Stepper.setParam(TON_MIN, 0x07);

Stepper.setParam(TOFF_MIN, 0x1F);

However, the return value from getStatus is 0xE403 ( 1110 0100 0000 0011), which indicates the undervoltage lockout and the flag LED keep winkling.

Can anyone help me to find out the problem?? Thank you.

Grace

Enrico Poli · ‎2014-08-21

Posted on August 21, 2014 at 14:16

Dear Grace,

the configuration looks ok.

Please, consider the following:

- at power up the device always returns an UVLO failure

- after you change the VCC_VAL value from 7.5V to 15V there is a transition time required to assering the new supply voltages at the VCC and BOOT pins, during this period the UVLO failure is triggered

- Check if the BOOT and VCC voltages are ok.

Kind Regards

Enrico