UM1692 datasheet(39/42 Pages) STMICROELECTRONICS

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UM1692

General description

“Go Until” example

40. Interrupt configuration for the SW MOTOR

41. Motor motion in a forward direction at speed 400 steps/s until the user puts a jumper on

J8, the LED_SPARE (YELLOW) toggles until the user puts a jumper on J8 | GoUntil

(ACT, DIR, SPD)

42. Motor stops

43. The LED_SPARE (YELLOW) is switched off.

44. Wait until not busy - busy pin test (L6472 pin 22).

45. Motor moves by 50,000 steps reverse | Move (DIR, N_STEP)

46. Motor moves to the position saved by the GoUntil command into the MARK register, so

50000 steps forward | GoMark

47. Wait until not busy - busy pin test (L6472 pin 22).

48. Nothing happens during a few seconds.

Release SW example

49. Motor motion in a reverse direction at minimum speed until the user removes the

jumper on J8, the LED_SPARE (YELLOW) toggles until the user removes the jumper

on J8 | ReleaseSW (ACT, DIR)

50. The LED_SPARE (YELLOW) is switched off.

51. Motor moves by 100,000 steps forward | Move (DIR, N_STEP)

52. Wait until not busy - busy pin test (L6472 pin 22).

53. Motor goes to home position set by the “ReleaseSW” command | GoHome

54. Wait until not busy - busy pin test (L6472 pin 22).

Step clock mode example

55. “Get Status” to clear FLAG due to switch turn-on event (falling edge on the SW pin) |

GetStatus

56. Motor runs in the step clock mode at 2000 steps/s in a forward direction for a few

seconds while a 2 kHz clock signal from the MCU is applied to the L6472 STCK pin

(25) | StepClock (DIR)

57. The above cited clock is stopped.

Buttons interrupt example

58. Buttons interrupt configuration:

Button_A

- Starts the motor at quarter of max. speed if it is stopped | Run (DIR, SPD)

- Doubles the motor speed if it is already running | Run (DIR, SPD)

Button_B

- Disables the power bridges after a smooth stop if the motor is running at

minimum speed | SoftHiZ

- Halves the motor speed if the motor is running above minimum speed | Run

(DIR, SPD).

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