Benefits of tSPI

The DRV8311P device integrates tSPI which allows for random write and read access to secondary motor driver devices for simultaneous motor control over a standard 4-wire SPI interface. This significantly reduce the number of wires in the system to reduce the overall system size and BOM costs. tSPI is especially useful in multi-motor systems by:

• Allowing random access to the DRV8311P devices with a general call address
• Performing read and writes in any order
• No requirement for all tSPI devices to be active at all times
• Perform transactions with any active secondary device regardless of the status of the other devices

For more information on using tSPI in multi-motor systems, refer Reduce Wires for Your Next Multi-Motor BLDC Design With tSPI Protocol.

Application Curves

Figure 10-7 PWM Synchronous Duty Cycle Operation with PWM_SYNC = 2b (10% - 90%) (PWM_SYNC, OUTA, OUTB, OUTC)