SLOSE84B August 2022 – October 2023 DRV8452
PRODUCTION DATA
The DRV8452 features the INDEX registers to indicate the expected microstep current and position of the motor to the user.
Table 7-12 shows the outputs of the CUR_A_POS and CUR_B_POS registers for a current waveform corresponding to 1/256 microstepping.
Current Quadrant |
CUR_A_POS |
CUR_A_SIGN |
CUR_B |
CUR_B_SIGN |
---|---|---|---|---|
First (0° -> 90°) |
0 -> 255 |
1b |
255 -> 0 |
1b |
Second (90° -> 180°) |
255 -> 0 |
1b |
0 -> 255 |
0b |
Third (180° -> 270°) |
0 -> 255 |
0b |
255 -> 0 |
0b |
Fourth (270° -> 360°) |
255 -> 0 |
0b |
0 -> 255 |
1b |
The Indexer outputs together with the nHOME signal allow determination of the motor position within the electrical wave. They can be compared with an encoder output to detect discrepancies in the movement of the motor - such as detecting step loss.