MC9S12HZ256 Datasheet, PDF (27/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 1 MC9S12HZ256 Device Overview
Figure 1-3 shows the device memory map for the MC9(3)S12HZ128 out of reset.
0x0000
0x0400
0x0800
0x2800
0x4000
0x0000 1K Register Space
0x03FF
0x0000
0x07FF
0x2800
Mappable to any 2K Boundary
2K Bytes EEPROM^
1K overlapped by register space
Mappable to any 2K Boundary
6K Bytes RAM
See table below for mapping options
0x3FFF
0x4000
0.5K, 1K, 2K or 4K Protected Sector
0x8000
0xC000
0xFF00
0xFFFF
VECTORS
NORMAL
SINGLE CHIP
0x7FFF ^{16K Fixed Flash or ROM}
0x8000 _{16K Page Window}
Eight * 16K Flash or ROM Pages
EXT
0xBFFF
0xC000 _{16K Fixed Flash or ROM}
VECTORS
VECTORS
0xFFFF
0xFF00
0xFFFF
2K, 4K, 8K or 16K Protected Boot Sector
BDM
(If Active)
EXPANDED*
SPECIAL
SINGLE CHIP
* Assuming that a ‘0’ was driven onto port K7 during reset to normal expanded mode
^ EEPROM is not available in ROM device
Figure 1-3. MC9(3)S12HZ128 Memory Map
Table 1-3. MC9(3)S12HZ128 RAM mapping options
INITRM¹
RAM location
Reserved location
(no Flash/ROM/EEPROM access)
0x00
0x0000 - 0x17FF
0x1800 - 0x2FFF
0x39
0x2800 - 0x3FFF
0x1000 - 0x27FF
0x40
0x4000 - 0x57FF
0x5800 - 0x6FFF
0x79
0x6800 - 0x7FFF
0x5000 - 0x67FF
0x80
0x8000 - 0x97FF
0x9800 - 0xAFFF
0xB9
0xA800 - 0xBFFF
0x9000 - 0xA7FF
0xC0
0xC000 - 0xD7FF
0xD800 - 0xEFFF
0xF9
0xE800 - 0xFFFF
0xD000 - 0xE7FF
1 _{User must initialize RAM13 bit to the same value as RAMHAL bit}
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
27