Datasheet

Chapter 17 Memory Mapping Control (S12XMMCV2)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor 649
Figure 17-31. ROMON = 0 in Emulation Expanded Mode
17.5.3.5 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 1-32).
Figure 17-32. ROM in Special Test Mode
Application
MCU
Memory
Emulator
Observer
Application
MCU
Memory
ROMON = 0
Application
MCU
Memory
ROMON = 1
Flash