AMIS-30624 I2C Microstepping Motordriver
Data Sheet
6.0 Table of Contents
1.0 General Description..............................................................................................................................................................................1
2.0 Product Features..................................................................................................................................................................................1
3.0 Applications..........................................................................................................................................................................................2
4.0 Ordering Information.............................................................................................................................................................................2
5.0 Quick Reference Data ..........................................................................................................................................................................2
6.0 Content.................................................................................................................................................................................................3
7.0 Block Diagram......................................................................................................................................................................................5
8.0 Pin-out..................................................................................................................................................................................................6
9.0 Package Thermal Resistance...............................................................................................................................................................7
9.1 SOIC-20............................................................................................................................................................................................7
9.2 NQFP-32...........................................................................................................................................................................................7
10.0 DC Parameters...................................................................................................................................................................................8
11.0 AC Parameters.................................................................................................................................................................................10
12.0 Typical Application............................................................................................................................................................................12
13.0 Positioning Parameters ....................................................................................................................................................................12
13.1 Stepping Modes............................................................................................................................................................................12
13.2 Maximum Velocity.........................................................................................................................................................................13
13.3 Minimum Velocity..........................................................................................................................................................................13
13.4 Acceleration and Deceleration ......................................................................................................................................................14
13.5 Positioning ....................................................................................................................................................................................14
13.5.1. Position Ranges ....................................................................................................................................................................15
13.5.2. Secure Position .....................................................................................................................................................................15
13.5.3. Shaft......................................................................................................................................................................................15
14.0 Structural Description .......................................................................................................................................................................16
14.1 Stepper Motordriver ......................................................................................................................................................................16
14.2 Control Logic (Position Controller and Main Control)....................................................................................................................16
14.3 Motion Detection...........................................................................................................................................................................16
14.4 Miscellaneous ...............................................................................................................................................................................16
15.0 Functional Description......................................................................................................................................................................17
15.1 Position Controller.........................................................................................................................................................................17
15.1.1. Positioning and Motion Control..............................................................................................................................................17
15.1.2. Dual Positioning ....................................................................................................................................................................19
15.1.3. Position Periodicity................................................................................................................................................................19
15.1.4. Hardwired Address HW.........................................................................................................................................................20
15.1.5. External Switch SWI..............................................................................................................................................................22
15.2 Main Control and Register, OTP Memory + ROM.........................................................................................................................23
15.2.1. Power-up Phase....................................................................................................................................................................23
15.2.2. Reset State............................................................................................................................................................................23
15.2.3. Soft Stop ...............................................................................................................................................................................23
15.2.4. Thermal Shutdown Mode ......................................................................................................................................................23
15.2.5. Temperature Management....................................................................................................................................................24
15.2.6. Battery Under-voltage Management......................................................................................................................................25
15.2.7. OTP register..........................................................................................................................................................................25
15.2.8. RAM Registers ......................................................................................................................................................................29
15.2.9. Flags Table............................................................................................................................................................................30
15.2.10. Priority Encoder...................................................................................................................................................................31
15.3 Motordriver....................................................................................................................................................................................33
15.3.1. Current waveforms in the coils ..............................................................................................................................................33
15.3.2. PWM Regulation ...................................................................................................................................................................34
15.3.3. PWM Jitter.............................................................................................................................................................................34
15.3.4. Motor Starting Phase.............................................................................................................................................................34
15.3.5. Motor Stopping Phase...........................................................................................................................................................34
15.3.6. Charge Pump Monitoring ......................................................................................................................................................35
15.3.7. Electrical Defect on Coils, Detection and Confirmation .........................................................................................................35
15.3.8. Motor Shutdown Mode ..........................................................................................................................................................36
15.4 Motion Detection...........................................................................................................................................................................37
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
3
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