SPRUIW9C October 2021 – March 2024 TMS320F280033 , TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037-Q1 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038-Q1 , TMS320F280038C-Q1 , TMS320F280039 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1
The TMS320F28003x MCU supports both internal and external VREG selectable using the VREGENZ pin to supply the 1.2V rail. However, not all packages support the external VREG option. For packages that do not support external VREG, the VREGENZ pin is replaced by GPIO39. For more details, see the data sheet.