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L6460 数据表(PDF) 65 Page - STMicroelectronics |
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L6460 数据表(HTML) 65 Page - STMicroelectronics |
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65 / 139 page  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 µs externally applied on GPIO12 (StepReq signal), according to Table 21. Vsupply Sense PH+ PH- Supply DC3_PH+ DC3_PH- DC4 PH+ DC4 PH- DC3SENSE DC4SENSE Stepper Motor Sense PH+ PH- Supply VRefB VRefA - Control Logic - Toff generation - DAC reference selection Bridge Driver Bridge Driver VSTEPREF VRefB VRefA StepperDACPhA StepperDACPhB SelStepRef Ref1 Ref2 |
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