Features
MC9S12B Family, Rev. 2.8
Freescale Semiconductor 9
Figure 4. MC9S12Bx128 User Configurable Memory Map
$0000
$FFFF
$C000
$8000
$4000
$0400
$0800
$1000
$3000
$FF00
EXT
NORMAL
SINGLE CHIP
EXPANDED SPECIAL
SINGLE CHIP
VECTORSVECTORS VECTORS
$FF00
$FFFF
BDM
(If Active)
$C000
$FFFF
16K Fixed Flash EEPROM
2K, 4K, 8K or 16K Protected Boot Sector
$8000
$BFFF
16K Page Window
Eight * 16K Flash EEPROM Pages
$4000
$7FFF
16K Fixed Flash EEPROM
1K, 2K, 4K or 8K Protected Sector
$3000
$3FFF
4K Bytes RAM
Mappable to any 4K Boundary
$0800
$0FFF
1K Bytes EEPROM
Mappable to any 2K Boundary
$0000
$03FF
1K Register Space
Mappable to any 2K Boundary
Repeated twice in the 2K Space
The figure shows a useful map, which is not the map out of reset. After reset the map is:
$0000 - $03FF: Register Space
$0000 - $0FFF: 4K RAM (only 3K visible $0400 - $0FFF)
$0000 - $07FF: 1K EEPROM (not visible)
$2000 - $3FFF: 12K Flash
