An errata is related to the Nexus port on MPC563xM devices. The slew rate on Nexus pins remains slow when Nexus is enabled.
Use the initialization sequence below to change the slew rate of Nexus pins.
Check the errata document for your target device to see if this issue is still applicable.
S 0xC3F901F6 W 0x000C
S 0xC3F901F8 W 0x000C
S 0xC3F901FA W 0x000C
S 0xC3F901FC W 0x000C
S 0xC3F901FE W 0x000C
S 0xC3F90200 W 0x000C
S 0xC3F90202 W 0x000C
S 0xC3F90206 W 0x000C
S 0xC3F90208 W 0x000C
See the Initialization Sequence chapter in winIDEA Help for more details on initialization sequence configuration.