SIM_MUXPTAH field descriptionsField Description7–6MUXPTA7Pin Mux ControlThe corresponding pin is configured in the following pin muxing slot:00 Alternative 0.01 Alternative 1.10 Alternative 2.11 Alternative 3.5–4MUXPTA6Pin Mux ControlThe corresponding pin is configured in the following pin muxing slot:00 Alternative 0.01 Alternative 1.10 Alternative 2.11 Alternative 3.3–2MUXPTA5Pin Mux ControlThe corresponding pin is configured in the following pin muxing slot:00 Alternative 0.01 Alternative 1.10 Alternative 2.11 Alternative 3.MUXPTA4 Pin Mux ControlThe corresponding pin is configured in the following pin muxing slot:00 Alternative 0.01 Alternative 1.10 Alternative 2.11 Alternative 3.9.8.9 System Port B Pin Multiplexing Control Register: Low(SIM_MUXPTBL)Many of the I/O pins are shared with on-chip peripheral functions. This register selectsthe multiplexing pin functions from ALT0 to ALT3. Default is ALT0 function, When thePin Muxing mode is configured for analog pins, all the digital functions on that pin aredisabled, including the pullup/output/input.The shared analog pin functions can work together if they’re enabled separately becausethey’re directly connected to internal analog modules separately. They still work evenwhen pin Muxing mode is configured for digital pins.Chapter 9 System Integration Module (SIM)MC9S08SU16 Reference Manual, Rev. 5, 4/2017NXP Semiconductors 113
