Datasheet TMC2226 (TRINAMIC) - 3

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Table of Contents
9.1
1
ANALOG CURRENT SCALING VREF ... 51
PRINCIPLES OF OPERATION ... 4 10
1.1
INTERNAL SENSE RESISTORS ... 53
KEY CONCEPTS .. 5 1.2 CONTROL INTERFACES ... 6
11 STALLGUARD4 LOAD MEASUREMENT ... 55
1.3 MOVING AND CONTROLLING THE MOTOR .. 6 11.1 STALLGUARD4 VS. STALLGUARD2 .. 55 1.4 STEALTHCHOP2 & SPREADCYCLE DRIVER ... 6 11.2 TUNING STALLGUARD4 ... 56 1.5 STALLGUARD4 – MECHANICAL LOAD SENSING . 11.3 STALLGUARD4 UPDATE RATE ... 56 ... 7 11.4 DETECTING A MOTOR STALL ... 56 1.6 COOLSTEP – LOAD ADAPTIVE CURRENT 11.5 LIMITS OF STALLGUARD4 OPERATION .. 56 CONTROL .. 7 1.7 AUTOMATIC STANDSTILL POWER DOWN... 7
12 COOLSTEP OPERATION ... 57
1.8 INDEX OUTPUT .. 8 12.1 USER BENEFITS ... 57 1.9 PRECISE CLOCK GENERATOR AND CLK INPUT... 8 12.2 SETTING UP FOR COOLSTEP .. 57
2 PIN ASSIGNMENTS ... 9
12.3 TUNING COOLSTEP ... 59 2.1 PACKAGE OUTLINE TMC2226 .. 9
13 STEP/DIR INTERFACE .. 60
2.2 SIGNAL DESCRIPTIONS TMC2226 .. 9 13.1 TIMING ... 60
3 SAMPLE CIRCUITS .. 11
13.2 CHANGING RESOLUTION ... 61 13.3 MICROPLYER STEP INTERPOLATOR AND STAND 3.1 STANDARD APPLICATION CIRCUIT .. 11 STILL DETECTION ... 62 3.2 INTERNAL RDSON SENSING .. 11 13.4 INDEX OUTPUT ... 63 3.3 5V ONLY SUPPLY .. 12 3.4 CONFIGURATION PINS .. 13
14 INTERNAL STEP PULSE GENERATOR ... 64
3.5 HIGH MOTOR CURRENT ... 13
15 DRIVER DIAGNOSTIC FLAGS .. 65
3.6 LOW POWER STANDBY ... 14 3.7 DRIVER PROTECTION AND EME CIRCUITRY ... 14 15.1 TEMPERATURE MEASUREMENT ... 65 15.2 SHORT PROTECTION .. 65
4 UART SINGLE WIRE INTERFACE .. 14
15.3 OPEN LOAD DIAGNOSTICS ... 66 4.1 DATAGRAM STRUCTURE ... 15 15.4 DIAGNOSTIC OUTPUT ... 66 4.2 CRC CALCULATION ... 17
16 QUICK CONFIGURATION GUIDE .. 67
4.3 UART SIGNALS .. 17 4.4 ADDRESSING MULTIPLE SLAVES .. 18
17 EXTERNAL RESET ... 71 5 REGISTER MAP ... 19 18 CLOCK OSCILLATOR AND INPUT ... 71
5.1 GENERAL REGISTERS ... 20
19 ABSOLUTE MAXIMUM RATINGS ... 72
5.2 VELOCITY DEPENDENT CONTROL ... 25
20 ELECTRICAL CHARACTERISTICS ... 72
5.3 STALLGUARD CONTROL ... 26 5.4 SEQUENCER REGISTERS ... 28 20.1 OPERATIONAL RANGE ... 72 5.5 CHOPPER CONTROL REGISTERS ... 29 20.2 DC AND TIMING CHARACTERISTICS .. 73 20.3 THERMAL CHARACTERISTICS.. 77
6 STEALTHCHOP™ .. 35 21 LAYOUT CONSIDERATIONS ... 78
6.1 AUTOMATIC TUNING ... 35 6.2 STEALTHCHOP OPTIONS .. 37 21.1 EXPOSED DIE PAD .. 78 6.3 STEALTHCHOP CURRENT REGULATOR ... 37 21.2 WIRING GND .. 78 6.4 VELOCITY BASED SCALING .. 39 21.3 SUPPLY FILTERING .. 78 6.5 COMBINE STEALTHCHOP AND SPREADCYCLE . 41 21.4 LAYOUT EXAMPLE TMC2226 .. 79 6.6 FLAGS IN STEALTHCHOP ... 42
22 PACKAGE MECHANICAL DATA .. 80
6.7 FREEWHEELING AND PASSIVE BRAKING .. 43 22.1 DIMENSIONAL DRAWINGS HTSSOP28 .. 80
7 SPREADCYCLE CHOPPER ... 45
22.2 PACKAGE CODES ... 81 7.1 SPREADCYCLE SETTINGS ... 46
23 TABLE OF FIGURES ... 82 8 SELECTING SENSE RESISTORS .. 49 24 REVISION HISTORY ... 83 9 MOTOR CURRENT CONTROL .. 50 25 REFERENCES .. 83
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