CHAPTER 27 STEPPER MOTOR CONTROLLER
[bit 2] SC: 8/10 bits switching bit
When "1" is set to the SC bit, the PWM pulse generator operates at 10 bits. When "0" is set to the SC bit,
the PWM pulse generator operates at 8 bits.
[bit 1 to 0] Reserved bit
Always write "0". Read value is undefined. Read-modify-write is not affected.
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MB96300 Super Series Hardware Manual