Chapter 3 Memory Mapping Control (S12XMMCV4)
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
209
Figure 3-18. BDMGPR Address Mapping
3.4.2.3
Implemented Memory Map
The global memory spaces reserved for the internal resources (RAM, EEE, 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 Device User 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.
When the device is operating in expanded modes except emulation single-chip mode, accesses to global
addresses which are not occupied by the on-chip resources (unimplemented areas or external memory
space) result in accesses to the external bus (see
Table 3-17. 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
FLASH
FLASH_LOW = 0x80_0000 minus FLASHSIZE
(2)
2. 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
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
