Hello, I am using L6474 drive to drive the stepper motor and I am having issues as mentioned below.

[MYadw.1]

Hello,

I am using L6474 drive to drive the stepper motor and I am having issues as mentioned below.

In status register the UVLO,TH_WRN,TH_SD and OCD flags are active low as mentioned in data sheet. 

In this the UVLO flag is set by undervoltage lockout or reset events (includes power on). So, when I read the status register the UVLO flag is always setting i.e. 0 is this the error occurred due to undervoltage only and whether it resets when I read status register ?

The NOTPERF_CMD and WRONG_CMD are always high. Why it is not resetting when I read the status register ?

[Cristiana SCARAMEL]

Hi @Community member​,

The GetStatus command returns the current Status register value and then resets the STATUS register warning flags.

To read the STATUS register reset you must send a second GetStatus command.

[MYadw.1]

Hi @Cristiana SCARAMEL​ 

In both the cases it is showing the same value.

And I am getting the UVLO error continuously after giving proper voltage also.

[Cristiana SCARAMEL]

Hi @Community member​,

During power-up the device is under reset until the following conditions are satisfied:

• VS is greater than VSthOn (8.2 typ.)
• VREG is greater than VREGth (2.8 V typ.)
• Internal oscillator is operative

Are you sure all three conditions are met?