CPC G11C 29/50004 (2013.01) [G11C 2029/5004 (2013.01)] | 15 Claims |
1. A signal processing system comprising:
a digital signal processing circuit;
a power management unit coupled to the digital signal processing circuit and configured to provide a first voltage to the digital signal processing circuit; and
a digital control circuit coupled to the digital signal processing circuit and the power management unit, and comprising a non-volatile memory, the digital control circuit being configured to, when in a calibration mode:
control the power management unit to set the first voltage at a minimum preset value;
control the digital signal processing circuit to operate under a first calibration target frequency;
trigger the digital signal processing circuit to perform a built-in self-test;
raise the first voltage when the built-in self-test fails;
trigger the digital signal processing circuit to perform the built-in self-test again; and
store the first calibration target frequency and a value of the first voltage corresponding to the first calibration target frequency to the non-volatile memory when the built-in self-test has succeeded.
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