Hello,
My customer would like to know what would happen if the RANGE bit of SMPSx_VOLTAGE register changes on the fly. If I look at the register map, I see the following sentences.
Note: RANGE cannot be changed on the fly when the SMPS is Active. To change the operation voltage range, SMPS has to be disabled.
Note: For Dual-phase and triple-phase modes, RANGE=1(1V to 3.3V) is not supported.
The customer did a try to confirm if this is true, but they saw strange behavior when they set RANGE=1 to SMPS12. The SMPS12 output rose up to 2.27V and went down to 0.0V after that.
Questions
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1. Would you please tell me what is the correct behavior when RANGE bit of SMPS12_VOLTAGE changes on the fly? If the register map is correct, the RANGE=1 setting should be ignored, so the output voltage doesn't change.
2. If the description of the register map is correct, what would be the root cause of the behavior my customer saw?
Best regards,
Yoshikazu Kawasaki