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L9942 Datasheet(PDF) 35 Page - STMicroelectronics |
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L9942 Datasheet(HTML) 35 Page - STMicroelectronics |
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35 / 40 page  L9942 Appendix Doc ID 11778 Rev 7 35/40 Figure 15. Stall detection 0 1 2 3 45 67 876 5 432 1 0 12 3 4 56 7 8 765 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 012 3 456 7 8 76 5 4 32 1 0 123 4 5 67 87 6 5 4 3 2 1 Current Driver A Current Driver B STEP Signal Adress of Current Profile Entry Phase Counter Micro Stepping Mode: DIR=0 01 23 45 67 87 6 5 43 2 1 0 1 23 45 6 7 8 7 6 5 4 3 2 1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 123 4 5 67 876 5 4 3 21 01 23 45 67 87 65 43 21 Current Driver A Current Driver B Micro Stepping Mode: DIR=1 0 Adress of Current Profile Entry Time PWM activ detection Load Current Rising During High Speed PWM activ counter Stall Threshold Stall Threshold Activ sampling and threshold Activ sampling and threshold PWM activ counter PWM activ detection PWM activ detection Counter value is above threshold value. bit6 bit7 D7 D6 D5 D4 D3 D2 D1 D0 Register 4 bit5 bit6 bit7 Reg3 Register 5 bit5 bit6 bit7 Stall Time Threshold 16us * No Stall Signal 012 3 45 67 8 7 65 43 21 0 1 23 4 5 67 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0 1 23 45 67 8 7 65 4 3 21 0 1 2 3 4 5 67 876 5 43 21 Current Driver A Current Driver B STEP Signal Adress of Current Profile Entry Phase Counter Micro Stepping Mode: DIR=0 0 1 23 4567 8 76 5 4321 0 1 2 3 4 5 678 7 6 5 4 3 2 1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4567 8 7 6 5 4 3 210 1 2 3 4 5 67 8 7 65 4321 Current Driver A Current Driver B Micro Stepping Mode: DIR=1 0 Adress of Current Profile Entry Time PWM activ detection PWM activ counter Stall Threshold Stall Threshold Activ sampling and threshold Activ sampling and threshold PWM activ counter PWM activ detection PWM activ detection Stall Signal Stall Signal Load Current Rising During Low Speed or Stall Counter value is below threshold value. |
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