Serializer-deserializer for motor drive circuit

A motor drive system, comprising:

• a first serializer-deserializer (SER-DES) having a first SER-DES input, a second SER-DES input, a first SER-DES output, and a second SER-DES output, the first SER-DES configured to convert:
• a first SER-DES serial data stream at the first SER-DES input into first SER-DES output signals at the first SER-DES output, the first SER-DES serial data stream including a first packet frame, and the first packet frame including first data specifying a first edge location for a first signal to begin within the first packet frame and including a first edge polarity specifying a rising or falling edge for the first signal at the first edge location;
• or first SER-DES input signals at the second SER-DES input into a second SER-DES serial data stream at the second SER-DES output, the second SER-DES serial data stream including a second packet frame, and the second packet frame including second data specifying a second edge location for a second signal to begin within the second packet frame and including a second edge polarity specifying a rising or falling edge for the second signal at the second edge location;
• a second SER-DES having a third SER-DES input, a fourth SER-DES input, a third SER-DES output, and a fourth SER-DES output, the second SER-DES configured to convert:
• second SER-DES input signals at the third SER-DES input into the first SER-DES serial data stream at the third SER-DES output;
• or the second SER-DES serial data stream at the fourth input into second SER-DES output signals at the fourth output;
• and
• a galvanic isolation barrier between the first SER-DES and the second SER-DES the third SER-DES output coupled to the first SER-DES input through the galvanic isolation barrier and the second SER-DES output coupled to the fourth input through the galvanic isolation barrier, the galvanic isolation barrier configured to communicate the second SER-DES serial data stream across the galvanic isolation barrier from the second output to the fourth input for adapted to be coupled to motor phase driver circuitry and configured to communicate the first SER-DES serial data stream across the galvanic isolation barrier from third output to the first input for the motor phase driver circuitry.

A method, comprising:

• converting, at a first serializer-deserializer (SER-DES), first SER-DES input signals into a first SER-DES output serial data stream, the first SER-DES input signals including motor control signals;
• converting, at a second SER-DES, the first SER-DES output serial data stream into second SER-DES output signals;
• converting, at the second SER-DES, second SER-DES input signals provided by motor driver power circuitry into a second SER-DES output serial data stream, the second SER-DES input signals including motor status signals;
• converting, at the first SER-DES, the second SER-DES output serial data stream into first SER-DES output signals;
• communicating the first SER-DES output serial data stream across a first galvanic isolation barrier to communicate the control signals from the motor controller to the motor driver power circuitry;
• communicating the second SER-DES output serial data stream across a second galvanic isolation barrier to communicate the motor status signals from the motor driver power circuitry to the motor controller;
• and
• formatting a packet frame in each of the first and second SER-DES output serial data streams to be communicated respectively via the first and second galvanic isolation barriers, the packet frame including data specifying an edge location for a signal to begin within the packet frame and including an edge polarity specifying a rising or falling edge for the signal at the edge location.