Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manual De Usuario
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DEMO9S12XHY256
Memory Mapping Control (S12XMMCV4)
MC9S12XHY-Family Reference Manual, Rev. 1.04
174
Freescale Semiconductor
Figure 3-18. BDMGPR Address Mapping
3.4.2.3
Implemented Memory Map
The global memory spaces reserved for the internal resources (RAM, Data FLASH, and FLASH) are not
determined by the MMC module. Size of the individual internal resources are however fixed in the design
of the device cannot be changed by the user. Please refer to the SoC Guide for further details.
determined by the MMC module. Size of the individual internal resources are however fixed in the design
of the device cannot be changed by the user. Please refer to the SoC Guide for further details.
and
show the memory spaces occupied by the on-chip resources. Please note that the memory
spaces have fixed top addresses.
Table 3-10. Global Implemented Memory Space
Internal Resource
$Address
RAM
RAM_LOW = 0x10_0000 minus RAMSIZE
1
1
RAMSIZE is the hexadecimal value of RAM SIZE in Bytes
Data FLASH
DF_HIGH = 0x10_0000 plus DFLASHSIZE
2
2
DFLASHSIZE is the hexadecimal value of DFLASH SIZE in Bytes
FLASH
FLASH_LOW = 0x80_0000 minus FLASHSIZE
3
3
FLASHSIZE is the hexadecimal value of FLASH SIZE in Bytes
Bit16
Bit0
Bit15
Bit22
BDM Local Address
BDMGPR Register [6:0]
Global Address [22:0]
Bit16
Bit0
Bit15
Bit22
CPU Local Address
BDMGPR Register [6:0]
Global Address [22:0]
BDM HARDWARE COMMAND
BDM FIRMWARE COMMAND