S912XEG128J2VAL
Model | S912XEG128J2VAL |
Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
PDF file | Total 1327 pages (File size: 7M) |
Chip Manufacturer | ROCHESTER |
Chapter 3 Memory Mapping Control (S12XMMCV4)
3.5.3.4
ROM Control in Emulation Expanded Mode
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
In emulation expanded mode the external bus will be connected to the emulator and to the application. If
the ROMON bit is set, the internal FLASH provides the data. If the EROMON bit is set as well the
emulator observes all CPU internal actions, otherwise the emulator provides the data and traces all CPU
actions (see
Figure 3-27).
When the ROMON bit is cleared, the application memory provides the data and
the emulator will observe the CPU internal actions (see
Figure 3-28).
Observer
MCU
Emulator
Flash
Application
Memory
EROMON = 1
Generator
MCU
Emulator
Flash
Application
Memory
EROMON = 0
Figure 3-27. ROMON = 1 in Emulation Expanded Mode
MC9S12XE-Family Reference Manual , Rev. 1.19
224
Freescale Semiconductor