MC9S12HZ256 Datasheet, PDF (28/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 1 MC9S12HZ256 Device Overview
Figure 1-4 shows the device memory map for the MC9(3)S12HZ64 and MC9(3)S12HN64 out of reset.
0x0000
0x0400
0x0800
0x3000
0x4000
0x0000 1K Register Space
0x03FF
0x0000
0x07FF
0x3000
Mappable to any 2K Boundary
1K Bytes EEPROM^
1K overlapped by register space
Mappable to any 2K Boundary
(1K mapped twice in 2K space)
4K Bytes RAM
See table below for mapping options
0x3FFF
0x4000
0.5K, 1K, 2K or 4K Protected Sector
0x8000
0x7FFF ^{16K Fixed Flash or ROM}
0x8000 _{16K Page Window}
Four * 16K Flash or ROM Pages
0xC000
0xBFFF
0xC000 _{16K Fixed Flash or ROM}
0xFFFF ^{2K, 4K, 8K or 16K Protected Boot Sector}
0xFF00
0xFFFF
VECTORS
VECTORS
0xFF00
0xFFFF
BDM
(If Active)
NORMAL
SINGLE CHIP
SPECIAL
SINGLE CHIP
^ EEPROM is not available in ROM devices
Figure 1-4. MC9(3)S12HZ64 and M9S12(3)HN64 Memory Map
Table 1-4. MC9(3)S12HZ64 and M9S12(3)HN64 RAM mapping options
INITRM¹
RAM location
Reserved location
(no Flash/ROM/EEPROM access)
0x00
0x0000 - 0x0FFF
0x1000 - 0x2FFF
0x39
0x3000 - 0x3FFF
0x1000 - 0x2FFF
0x40
0x4000 - 0x4FFF
0x5000 - 0x6FFF
0x79
0x7000 - 0x7FFF
0x5000 - 0x6FFF
0x80
0x8000 - 0x8FFF
0x9000 - 0xAFFF
0xB9
0xB000 - 0xBFFF
0x9000 - 0xAFFF
0xC0
0xC000 - 0xCFFF
0xD000 - 0xEFFF
0xF9
0xF000 - 0xFFFF
0xD000 - 0xEFFF
1 _{User must initialize RAM13 and RAM12 bits to the same value as RAMHAL bit}
MC9S12HZ256 Data Sheet, Rev. 2.04
28
Freescale Semiconductor