mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 542

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 19 Module Mapping Control (MMCV4)
19.1.1
19.1.2
Some of the registers operate differently depending on the mode of operation (i.e., normal expanded wide,
special single chip, etc.). This is best understood from the register descriptions.
19.2
All interfacing with the MMC sub-block is done within the core, it has no external signals.
19.3
A summary of the registers associated with the MMC sub-block is shown in
descriptions of the registers and bits are given in the subsections that follow.
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Registers for mapping of address space for on-chip RAM, EEPROM, and FLASH (or ROM)
memory blocks and associated registers
Memory mapping control and selection based upon address decode and system operating mode
Core address bus control
Core data bus control and multiplexing
Core security state decoding
Emulation chip select signal generation (ECS)
External chip select signal generation (XCS)
Internal memory expansion
External stretch and ROM mapping control functions via the MISC register
Reserved registers for test purposes
Configurable system memory options defined at integration of core into the system-on-a-chip
(SoC).
External Signal Description
Memory Map and Register Definition
Features
Modes of Operation
MC9S12E256 Data Sheet, Rev. 1.08
Figure
19-2. Detailed
Freescale Semiconductor