Datasheet

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 ~1µs externally applied on
GPIO12 (StepReq signal), according to Tabl e 21 .
V
supply
Sens
e
PH+
PH-
Suppl
y
DC3
_PH+
DC3
_PH-
DC4
PH+
DC4
PH
-
DC3
SENSE
DC4
SENSE
Stepper
Motor
Sens
e
PH+
PH-
Suppl
y
VRefB
VRefA
- Control Logic
- Toff generation
- DAC reference
selection
Bridge Drive
r
Bridge Drive
r
V
STEPREF
VRefB
VRefA
StepperDACPhA
StepperDACPhB
SelStepRe
f
Ref1
Ref2