The TMS320F28P55x MCU device family
requires an external device to supply the necessary voltage and current for proper
operation. Separate voltage rails are available for core (1.2V), analog (3.3V), Flash (3.3V)
and I/O logic (3.3V). The following mechanisms can be used to improve the diagnostic
coverage of the C2000 MCU power supply.
Note: - Having independent voltage supervision at
system-level is an assumption used while performing safety analysis.
- Devices can be implemented with multiple power
rails that are intended to be ganged together on the system PCB. For proper operation of
power diagnostics, TI recommends implementing one voltage supervisor per ganged
rail.
- Common mode failure analysis of the external
voltage supervisor, along withTMS320F28P55x MCU, is useful to determine dependencies in the voltage generation and
supervision circuitry.
- Customers can consider using TI's TPS6538x power supply and safety-companion
device for voltage supervision at system-level.