STMicroelectronics Fully integrated stepper motor driver mounting the L6472 in a high power PowerSO package EVAL6472PD EVAL6472PD Data Sheet

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DocID022729 Rev 3

          

When the HiZ flag is high it indicates that the bridges are in high-impedance state. Any 
motion command causes the device to exit from High Z state (HardStop and SoftStop 
included), unless error flags forcing a High Z state are active.

The UVLO flag is active low and is set by an undervoltage lockout or reset event (power-up 
included). The TH_WRN, TH_SD, OCD flags are active low and indicate respectively 
thermal warning, thermal shutdown and overcurrent detection events.

The NOTPERF_CMD and WRONG_CMD flags are active high and indicate, respectively, 
that the command received by SPI can't be performed or does not exist at all. The SW_F 
reports the SW input status (low for open and high for closed).

The SW_EVN flag is active high and indicates a switch turn-on event (SW input falling 
edge).

The UVLO, TH_WRN, TH_SD, OCD, NOTPERF_CMD, WRONG_CMD and SW_EVN flags 
are latched: when the respective conditions make them active (low or high) they remain in 
that state until a GetStatus command is sent to the IC.

The BUSY bit reflects the BUSY pin status. The BUSY flag is low when a constant speed, 
positioning or motion command is under execution and is released (high) after the 
command has been completed.

The SCK_MOD bit is an active high flag indicating that the device is working in step-clock 
mode. In this case the step-clock signal should be provided through the STCK input pin. The 
DIR bit indicates the current motor direction:

         

SCK_MOD X X 

OCD 

TH_SD 

TH_WRN 

UVLO 

WRONG_CMD 

Bit 7 

Bit 6 

Bit 5 

Bit 4 

Bit 3 

Bit 2 

Bit 1 

Bit 0 

NOTPERF_CMD MOT_STATUS  DIR SW_EVN  SW_F  BUSY 

HiZ 

1 Forward 

0 Reverse