mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 647

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

17.5.3.3
In normal expanded mode the external bus will be connected to the application. If the ROMON bit is set,
the internal FLASH provides the data. If the ROMON bit is cleared, the application memory provides the
data (see
Freescale Semiconductor
Figure
ROM Control in Normal Expanded Mode
1-29).
MCU
MCU
Figure 17-29. ROM in Normal Expanded Mode
MC9S12XDP512 Data Sheet, Rev. 2.17
Flash
Application
Application
Chapter 17 Memory Mapping Control (S12XMMCV2)
Memory
Memory
ROMON = 1
ROMON = 0
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