S912XEP100J5MAG Datasheet, PDF (225/1324 Pages) Freescale Semiconductor, Inc – Features of the MC9S12XE-Family are listed here. Please see Table D-2.for memory options and Table D-2. for the peripheral features that are available on the different family members.

MCU
Chapter 3 Memory Mapping Control (S12XMMCV4)
Emulator
Observer
Application
Memory
Figure 3-28. ROMON = 0 in Emulation Expanded Mode
3.5.3.5 ROM Control in Special Test Mode
In special test mode the external bus is connected to the application. If the ROMON bit is set, the internal
FLASH provides the data, otherwise the application memory provides the data (see Figure 3-29).
MCU
Application
Memory
ROMON = 0
MCU
Application
Flash
Memory
ROMON = 1
Figure 3-29. ROM in Special Test Mode
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
225