AM263P2-Q1: Signal conditioning required or not for Resolver

Yes you need external circuits (a front end) you cannot connect a resolver directly.

Here's an example circuit: https://www.ti.com/lit/ug/tidudp0/tidudp0.pdf

Hi Aravind,

The reference provided by Kier is a good resource, please refer the same.

Also there are two parts to the external circuitry needed to interface a hardware resolver to the Resolver to Digital Converter(RDC) on AM263P.

On the excitation signal going from MCU to the hardware resolver, the AM263P MCU generates a RES0_PWMOUTx signal which is Sine modulated PWM signal. The excitation signal from this PWM needs to be extracted and provided to the Hardware Resolver. This can be done using a circuit similar to what is shown in Figure 7-147 of AM263Px Sitara Microcontrollers Technical Reference Manual (Rev. D).

On the Sine and Cosine signals coming back to the MCU from Hardware Resolver, these signals usually have typical voltage range of 10Vpp. This needs to be brought down to 3.3Vpp which is the RDC specification of the AM263P MCU. This analog front-end circuits need to be used, which can bring down these voltages to 3.3Vpp or lesser.

Thanks,
Tejas Kulakarni