MC68LC302 Datasheet, PDF (35/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

Configuration, Clocking, Low Power Modes, and Internal Memory Map
In addition to the internal dual-port RAM, a number of internal registers support the functions
of the various M68000 core peripherals. The internal registers (see Table 2-6) are memory-
mapped registers offset from the BAR pointer and are located on the internal M68000 bus.
NOTE
All undefined and reserved bits within registers and parameter
RAM values written by the user in a given application should be
written with zero to allow for future enhancements to the device.
2-22
MC68LC302 REFERENCE MANUAL
MOTOROLA