Datasheet

Chapter 3 Memory Mapping Control (S12XMMCV4)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 221
3.5.3 On-Chip ROM Control
The MCU offers two modes to support emulation. In the first mode (called generator) the emulator
provides the data instead of the internal FLASH and traces the CPU actions. In the other mode (called
observer) the internal FLASH provides the data and all internal actions are made visible to the emulator.
3.5.3.1 ROM Control in Single-Chip Modes
In single-chip modes the MCU has no external bus. All memory accesses and program fetches are internal
(see Figure 3-24).
Table 3-21. PRR Listing
PRR Name PRR Local Address PRR Location
PORTA 0x0000 PIM
PORTB 0x0001 PIM
DDRA 0x0002 PIM
DDRB 0x0003 PIM
PORTC 0x0004 PIM
PORTD 0x0005 PIM
DDRC 0x0006 PIM
DDRD 0x0007 PIM
PORTE 0x0008 PIM
DDRE 0x0009 PIM
MMCCTL0 0x000A MMC
MODE 0x000B MMC
PUCR 0x000C PIM
RDRIV 0x000D PIM
EBICTL0 0x000E EBI
EBICTL1 0x000F EBI
Reserved 0x0012 MMC
MMCCTL1 0x0013 MMC
ECLKCTL 0x001C PIM
Reserved 0x001D PIM
PORTK 0x0032 PIM
DDRK 0x0033 PIM