Datasheet

Chapter 3 Memory Mapping Control (S12XMMCV4)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 225
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).
Figure 3-29. ROM in Special Test Mode
Application
MCU
Memory
Emulator
Observer
Application
MCU
Memory
ROMON = 0
Application
MCU
Memory
ROMON = 1
Flash