SPRACK2A September   2019  – March 2020 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1

 

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2.4 PGA Ground

The F28002x device does not have PGAs. The two PGA_GND pins on the 64-pin package are converted to ADC channels. PGA135_GND is now A15/C7/AIO233, and PGA246_GND is now A8/C11/AIO241.

If using a F28002x device in a F28004x board:

  • If PGA135_GND and PGA246_GND pins are not tied to GND, they can be used as the ADC channels.
  • If PGA135_GND and PGA246_GND pins are tied to GND, those two ADC channels will read a low conversion.

If using a F28004x device in a F28002x board, tie A15/C7/AIO233 and A8/C11/AIO241 to VSSA.