STMicroelectronics FlexSPIN: SPI configurable stepper and DC multi motor driver evaluation board EVAL6460 EVAL6460 Data Sheet
Product codes
EVAL6460
L6460
Power bridges
Doc ID 17713 Rev 1
65/139
Figure 18.
Bipolar stepper configuration
Using the StepCtrlMode[2:0] bits in StepCfg1 register, L6460 can be programmed to
internally generate the stepping levels. In these cases and depending on the StepFromGpio
bit in the StpCfg1 register the Stepper driver will move to next step each time the StepCmd
bit is set at logic level “1” or at each pulse transition longer than ~1
internally generate the stepping levels. In these cases and depending on the StepFromGpio
bit in the StpCfg1 register the Stepper driver will move to next step each time the StepCmd
bit is set at logic level “1” or at each pulse transition longer than ~1
µs externally applied on
GPIO12 (StepReq signal), according to
V
supply
Sense
PH+
PH-
Supply
DC3
_PH+
DC3
_PH-
DC4
PH+
DC4
PH-
DC3
SENSE
DC4
SENSE
Stepper
Motor
Motor
Sense
PH+
PH-
Supply
VRefB
VRefA
- Control Logic
- Toff generation
- Toff generation
- DAC reference
selection
selection
Bridge Driver
Bridge Driver
V
STEPREF
VRefB
VRefA
StepperDACPhA
StepperDACPhB
SelStepRef
Ref1
Ref2