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Renesas Digital Signal Processing (DSP) ICs convert the signal from the resolver sensor for a brushless DC motor and stepping motor into an angle signal and a position signal for an RX MCU.
The RAA306400XGFP is an R/D (Resolver/Digital) conversion IC that converts the resolver detection signal (electrical angle information), which is an analog signal based on the mechanical rotation angle of the resolver, from a one-phase excitation two-phase output type resolver sensor (angle sensor) into a digital signal that is then output.