This manual describes the capabilities， operation， and function of the Freescale MPC561/MPC563 microcontrollers. The documentation follows the modular construction of the devices in the MPC500 family product line. Each microcontroller in the MPC500 family has a comprehensive reference manual that provides sufficient information for normal operation of the device. The reference manual is supplemented by module-specific reference manuals that provide detailed information about module operation and applications. Where information in this manual varies from information in other references， this manual takes precedence. Refer to Suggested Reading for further information. Unless otherwise noted， references to the MPC561 and MPC563 also apply to their code compressed counterparts， the MPC562 and MPC564， respectively. Any functional differences between the MPC561/MPC563 and MPC562/MPC564 are noted. MPC562/MPC564-specific information is located in Appendix A， “MPC562/MPC564 Compression Features.”