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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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POWERSTEP01TR 数据表(PDF) 23 Page - STMicroelectronics |
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POWERSTEP01TR 数据表(HTML) 23 Page - STMicroelectronics |
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23 / 92 page  DocID025022 Rev 5 23/92 powerSTEP01 Functional description 92 Figure 5. Charge pump circuitry 7.4 Microstepping The driver is able to divide the single step into up to 128 microsteps. Stepping mode can be programmed by the STEP_SEL parameter in the STEP_MODE register (Table 27 on page 61). In current mode driving the maximum microstepping resolution is 1/16th of the step. Step mode can only be changed when bridges are disabled. Every time the step mode is changed, the electrical position (i. e. the point of microstepping sinewave that is generated) is reset to zero and the absolute position counter value (Section 7.5) becomes meaningless. Figure 6. Normal mode and microstepping (128 microsteps) V S D2 V CP f PUMP to high-side gate drivers V S CP V D1 C BOOT C FLY D1 D2 VBOOT CP VDD V Charge pump oscillator + V V S CP V D1 + V AM12827v1 step 1 step 1 step 2step 3step 4 step 1 Reset position step 1 step 2 step 3 step 4 Normal driving Microstepping PHASE A current PHASE B current PHASE A current PHASE B current microsteps 128 μsteps 128 μsteps 128 μsteps 128 μsteps Reset position AM12828v1 |
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