AN3283: The MPC5500 family of devices has internal Flash used for code and data. The Nexus debug interface can be used to program the Flash using the JTAG communication protocol through the JTAG port
AN3283, MPC5500 Flash Programming Through Nexus/JTAG - Application Notes
AN3283: The MPC5500 family of devices has internal Flash used for code and data. The Nexus debug interface can be used to program the Flash using the JTAG communication protocol through the JTAG port