Motor controller with deterministic synchronous interrupt having multiple serial interface backplane

A method of operating a motor drive, comprising:

• transmitting one or more signals from a plurality of functional circuit to a control circuit via one or more synchronous interrupts, wherein each of the plurality of functional circuits is supported separate from the control circuit and is coupled to the control circuit via a dedicated serial interface.

A tangible machine readable medium, comprising:

• code stored on the tangible machine-readable medium defining instructions for transmitting one or more signals from a plurality of functional circuit to a control circuit via one or more synchronous interrupts, wherein each of the plurality of functional circuits is supported separate from the control circuit and is coupled to the control circuit via a dedicated serial interface.