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The Vector Base Register, VBR, points to the dBUG Flash memory space. However, a copy
of the exception table is made at address $00000000 in SDRAM memory space. To take over
an exception vector, the user places the address of the exception handler in the appropriate
vector in the vector table located at 0x00000000, and then points the VBR register to
0x00000000. See the MCF5485 User Guide and ColdFire Programmers Reference Manual
for more details on applying interrupts.
dBUG Memory Map
0x00000000
0x000003FF
External DDRAM Memory: User Vector table if applied.
See Interrupt Support for more information.
1K bytes
0x00000400
0x0001FFFF
External DDRAM Memory: dBUG
reserved
ram space.
128K bytes
0x00020000
0x03FFFFFF
External DDRAM Memory: User ram or development
memory space
64M bytes, 32 bits wide, 100Mhz
0x04000000 - 0x3FFFFFFF
Not applied memory space.
reserved
0x40000000
0x7FFFFFFF
ISBAR: MCF5485 Internal register and peripheral
space. Includes internal ram space.
Refer to MCF5485 User Manual for details.
0x80000000 - 0xFF7FFFFF
Not applied memory space.
reserved
0xFF800000
0xFF83FFFF
DBUG Monitor Flash Memory Space.
reserved
256K bytes
0xFF840000
0xFFFFFFFF
User External Flash Memory Space
7.8M bytes, 16 bits wide
Note: Applying BDM / JTAG development port tools does not require applying the dBUG
memory map.
