S912XEG128J2MAA Datasheet, PDF (225/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

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