JAJS504K October 2009 – January 2022 DRV8824
PRODUCTION DATA
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Built-in indexer logic in the DRV8824 allows a number of different stepping configurations. The MODE0 through MODE2 pins are used to configure the stepping format, as shown in Table 7-1.
| MODE2 | MODE1 | MODE0 | STEP MODE |
|---|---|---|---|
| 0 | 0 | 0 | Full step (2-phase excitation) with 71% current |
| 0 | 0 | 1 | 1/2 step (1-2 phase excitation) |
| 0 | 1 | 0 | 1/4 step (W1-2 phase excitation) |
| 0 | 1 | 1 | 8 microsteps/step |
| 1 | 0 | 0 | 16 microsteps/step |
| 1 | 0 | 1 | 32 microsteps/step |
| 1 | 1 | 0 | 32 microsteps/step |
| 1 | 1 | 1 | 32 microsteps/step |
Table 7-2 shows the relative current and step directions for different settings of MODEx. At each rising edge of the STEP input, the indexer travels to the next state in the table. The direction is shown with the DIR pin high; if the DIR pin is low, the sequence is reversed. Positive current is defined as xOUT1 = positive with respect to xOUT2.
Note that if the step mode is changed while stepping, the indexer advances to the next valid state for the new MODEx setting at the rising edge of STEP.
The home state is 45°. This state is entered at power-up or application of nRESET. This is shown in Table 7-2 by the shaded cells. The logic inputs DIR, STEP, nRESET, and MODEx have an internal pulldown resistors of
100 kΩ
| 1/32 STEP | 1/16 STEP | 1/8 STEP | 1/4 STEP | 1/2 STEP | FULL STEP 70% | WINDING CURRENT A | WINDING CURRENT B | ELECTRICAL ANGLE |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 1 | 100% | 0% | 0 | |
| 2 | 100% | 5% | 3 | |||||
| 3 | 2 | 100% | 10% | 6 | ||||
| 4 | 99% | 15% | 8 | |||||
| 5 | 3 | 2 | 98% | 20% | 11 | |||
| 6 | 97% | 24% | 14 | |||||
| 7 | 4 | 96% | 29% | 17 | ||||
| 8 | 94% | 34% | 20 | |||||
| 9 | 5 | 3 | 2 | 92% | 38% | 23 | ||
| 10 | 90% | 43% | 25 | |||||
| 11 | 6 | 88% | 47% | 28 | ||||
| 12 | 86% | 51% | 31 | |||||
| 13 | 7 | 4 | 83% | 56% | 34 | |||
| 14 | 80% | 60% | 37 | |||||
| 15 | 8 | 77% | 63% | 39 | ||||
| 16 | 74% | 67% | 42 | |||||
| 17 | 9 | 5 | 3 | 2 | 1 | 71% | 71% | 45 |
| 18 | 67% | 74% | 48 | |||||
| 19 | 10 | 63% | 77% | 51 | ||||
| 20 | 60% | 80% | 53 | |||||
| 21 | 11 | 6 | 56% | 83% | 56 | |||
| 22 | 51% | 86% | 59 | |||||
| 23 | 12 | 47% | 88% | 62 | ||||
| 24 | 43% | 90% | 65 | |||||
| 25 | 13 | 7 | 4 | 38% | 92% | 68 | ||
| 26 | 34% | 94% | 70 | |||||
| 27 | 14 | 29% | 96% | 73 | ||||
| 28 | 24% | 97% | 76 | |||||
| 29 | 15 | 8 | 20% | 98% | 79 | |||
| 30 | 15% | 99% | 82 | |||||
| 31 | 16 | 10% | 100% | 84 | ||||
| 32 | 5% | 100% | 87 | |||||
| 33 | 17 | 9 | 5 | 3 | 0% | 100% | 90 | |
| 34 | –5% | 100% | 93 | |||||
| 35 | 18 | –10% | 100% | 96 | ||||
| 36 | –15% | 99% | 98 | |||||
| 37 | 19 | 10 | –20% | 98% | 101 | |||
| 38 | –24% | 97% | 104 | |||||
| 39 | 20 | –29% | 96% | 107 | ||||
| 40 | –34% | 94% | 110 | |||||
| 41 | 21 | 11 | 6 | –38% | 92% | 113 | ||
| 42 | –43% | 90% | 115 | |||||
| 43 | 22 | –47% | 88% | 118 | ||||
| 44 | –51% | 86% | 121 | |||||
| 45 | 23 | 12 | –56% | 83% | 124 | |||
| 46 | –60% | 80% | 127 | |||||
| 47 | 24 | –63% | 77% | 129 | ||||
| 48 | –67% | 74% | 132 | |||||
| 49 | 25 | 13 | 7 | 4 | 2 | –71% | 71% | 135 |
| 50 | –74% | 67% | 138 | |||||
| 51 | 26 | –77% | 63% | 141 | ||||
| 52 | –80% | 60% | 143 | |||||
| 53 | 27 | 14 | –83% | 56% | 146 | |||
| 54 | –86% | 51% | 149 | |||||
| 55 | 28 | –88% | 47% | 152 | ||||
| 56 | –90% | 43% | 155 | |||||
| 57 | 29 | 15 | 8 | –92% | 38% | 158 | ||
| 58 | –94% | 34% | 160 | |||||
| 59 | 30 | –96% | 29% | 163 | ||||
| 60 | –97% | 24% | 166 | |||||
| 61 | 31 | 16 | –98% | 20% | 169 | |||
| 62 | –99% | 15% | 172 | |||||
| 63 | 32 | –100% | 10% | 174 | ||||
| 64 | –100% | 5% | 177 | |||||
| 65 | 33 | 17 | 9 | 5 | –100% | 0% | 180 | |
| 66 | –100% | –5% | 183 | |||||
| 67 | 34 | –100% | –10% | 186 | ||||
| 68 | –99% | –15% | 188 | |||||
| 69 | 35 | 18 | –98% | –20% | 191 | |||
| 70 | –97% | –24% | 194 | |||||
| 71 | 36 | –96% | –29% | 197 | ||||
| 72 | –94% | –34% | 200 | |||||
| 73 | 37 | 19 | 10 | –92% | –38% | 203 | ||
| 74 | –90% | –43% | 205 | |||||
| 75 | 38 | –88% | –47% | 208 | ||||
| 76 | –86% | –51% | 211 | |||||
| 77 | 39 | 20 | –83% | –56% | 214 | |||
| 78 | –80% | –60% | 217 | |||||
| 79 | 40 | –77% | –63% | 219 | ||||
| 80 | –74% | –67% | 222 | |||||
| 81 | 41 | 21 | 11 | 6 | 3 | –71% | –71% | 225 |
| 82 | –67% | –74% | 228 | |||||
| 83 | 42 | –63% | –77% | 231 | ||||
| 84 | –60% | –80% | 233 | |||||
| 85 | 43 | 22 | –56% | –83% | 236 | |||
| 86 | –51% | –86% | 239 | |||||
| 87 | 44 | –47% | –88% | 242 | ||||
| 88 | –43% | –90% | 245 | |||||
| 89 | 45 | 23 | 12 | –38% | –92% | 248 | ||
| 90 | –34% | –94% | 250 | |||||
| 91 | 46 | –29% | –96% | 253 | ||||
| 92 | –24% | –97% | 256 | |||||
| 93 | 47 | 24 | –20% | –98% | 259 | |||
| 94 | –15% | –99% | 262 | |||||
| 95 | 48 | –10% | –100% | 264 | ||||
| 96 | –5% | –100% | 267 | |||||
| 97 | 49 | 25 | 13 | 7 | 0% | –100% | 270 | |
| 98 | 5% | –100% | 273 | |||||
| 99 | 50 | 10% | –100% | 276 | ||||
| 100 | 15% | –99% | 278 | |||||
| 101 | 51 | 26 | 20% | –98% | 281 | |||
| 102 | 24% | –97% | 284 | |||||
| 103 | 52 | 29% | –96% | 287 | ||||
| 104 | 34% | –94% | 290 | |||||
| 105 | 53 | 27 | 14 | 38% | –92% | 293 | ||
| 106 | 43% | –90% | 295 | |||||
| 107 | 54 | 47% | –88% | 298 | ||||
| 108 | 51% | –86% | 301 | |||||
| 109 | 55 | 28 | 56% | –83% | 304 | |||
| 110 | 60% | –80% | 307 | |||||
| 111 | 56 | 63% | –77% | 309 | ||||
| 112 | 67% | –74% | 312 | |||||
| 113 | 57 | 29 | 15 | 8 | 4 | 71% | –71% | 315 |
| 114 | 74% | –67% | 318 | |||||
| 115 | 58 | 77% | –63% | 321 | ||||
| 116 | 80% | –60% | 323 | |||||
| 117 | 59 | 30 | 83% | –56% | 326 | |||
| 118 | 86% | –51% | 329 | |||||
| 119 | 60 | 88% | –47% | 332 | ||||
| 120 | 90% | –43% | 335 | |||||
| 121 | 61 | 31 | 16 | 92% | –38% | 338 | ||
| 122 | 94% | –34% | 340 | |||||
| 123 | 62 | 96% | –29% | 343 | ||||
| 124 | 97% | –24% | 346 | |||||
| 125 | 63 | 32 | 98% | –20% | 349 | |||
| 126 | 99% | –15% | 352 | |||||
| 127 | 64 | 100% | –10% | 354 | ||||
| 128 | 100% | –5% | 357 |