5 Summary

This user's guide has detailed the procedures for accessing and using the I2C interface on the MC121-Q1, MC121, and MC111 devices for both Test Programming and OTP (One-Time Programmable) Programming modes. Test Programming Mode provides a volatile method for configuring motor performance parameters through I2C, where settings are temporary and revert to default or programmed OTP values upon a power cycle. In contrast, OTP Programming Mode enables permanent configuration storage, requiring a stable supply voltage (V_VM) above 8V and a specific unlocking sequence of 2h, 1h, and 4h. To operate these modes, users must follow specific signal requirements on the PWM/DC and FG/RD pins to enter I2C mode. Successful programming requires careful management of the two available OTP pages, using the provided register map to verify CRC integrity, page selection, and programming status. Continuous validation through the status registers is essential so that the correct configuration is loaded and that no errors occurred during the burn process. By following these technical guidelines, engineers can reliably customize device behavior for specific single ohase BLDC applications and provide permanent, stable motor control settings.