SWCU193 April 2023 CC2340R2 , CC2340R5 , CC2340R5-Q1
The radio has 8 general purpose outputs (GPO) and 8 general purpose inputs (GPI). Each of the eight individual output lines can be independently configured to output various internal signals. The selection of output source is done in the LRFDDBELL:GPOSEL0 and LRFDDBELL:GPOSEL1 registers. The GPO signals originating in MDM, PBE and RFE are all fully firmware driven. Different use cases have different features mapped to the GPO. Uses for the GPO include control of external switches, LNAs, PAs, and handshaking with other devices. Any control of GPO is documented in the SDK.
The GPI lines are all routed to the MDM, PBE, and RFE for use by the processors in these sub-domains.