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LS7290 Datasheet(PDF) 8 Page - LSI Computer Systems |
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LS7290 Datasheet(HTML) 8 Page - LSI Computer Systems |
8 / 9 page 7290-072011-8 TABLE 2 STEP NUMBER % DUTY CYCLE PHASES STEP ANGLE FULL 1/2 INH1 INH2 PHA PHB PHC PHD 0 0 100 0 1 0 1 0 HOME 1 70.7 70.7 1 0 1 0 45 1 2 0 100 0 1 1 0 90 3 -70.7 70.7 0 1 1 0 135 2 4 -100 0 0 1 0 1 180 5 -70.7 -70.7 0 1 0 1 225 3 6 0 -100 1 0 0 1 270 7 70.7 -70.7 1 0 0 1 315 0 0 100 0 1 0 1 0 HOME FIGURE 8. Selecting Between Fast and Slow Decay for One Stepper Motor Winding (Use identical circuit for the other stepper motor winding) NOTE: In fast decay mode, inhibit windings are chopped. In slow decay mode, phase windings are chopped. NOR Gates: CD4001 OR Gates: CD4071 |
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