MC9S12T64 Datasheet, PDF (116/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Operating Modes
1 = Internal bus operations are visible on external bus.
0 = No visibility of internal bus operations on external bus.
NOTE:
The program page window ($8000–$BFFF) may not be correctly
monitored with this internal visibility function, since there are no
indications of PPAGE (page index register) to the outside from the MCU.
EMK — Emulate Port K
Normal: write once
Emulation: write never
Special: write anytime
1 = If in any expanded mode or special peripheral mode, PORTK
and DDRK are removed from the memory map.
0 = PORTK and DDRK are in the memory map so Port K can be
used for general purpose I/O.
In single-chip modes, PORTK and DDRK are always in the map
regardless of the state of this bit.
In peripheral modes, PORTK and DDRK are never in the map
regardless of the state of this bit.
EME — Emulate Port E
Normal and Emulation: write never
Special: write anytime
1 = If in any expanded mode or special peripheral mode, PORTE
and DDRE are removed from the memory map. Removing the
registers from the map allows the user to emulate the function
of these registers externally.
0 = PORTE and DDRE are in the memory map so Port E can be
used for general purpose I/O.
In single-chip modes, PORTE and DDRE are always in the map
regardless of the state of this bit.
Background Debug Mode
Background debug mode (BDM) is an auxiliary operating mode that is
used for system development. BDM is implemented in on-chip hardware
MC9S12T64Revision 1.1.1
116
Operating Modes
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