MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 31

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

ROMON — Enable Flash EEPROM
5.4 Memory Maps
MC68HC912B32
MC68HC912B32TS/D
In expanded modes ROMON is reset to zero. In single-chip modes it is reset to one. If the internal RAM,
registers, EEPROM, or BDM ROM (if active) are mapped to the same space as the Flash EEPROM,
they will have priority over the Flash EEPROM.
The following diagrams illustrate the memory map for each mode of operation immediately after reset.
$FFC0
$FFFF
$0D00
$FF00
$0000
$8000
$F000
$0800
0 = Disables the Flash EEPROM in the memory map
1 = Enables the Flash EEPROM in the memory map
EXPANDED
VECTORS
SINGLE CHIP
NORMAL
VECTORS
Figure 6 MC68HC912B32 Memory Map
SINGLE CHIP
SPECIAL
VECTORS
$FF00
$FFFF
$01FF
$0BFF
$0D00
$0FFF
$0000
$0200
$03FF
$0800
REGISTERS
512 BYTES RAM
MAP TO ANY 2K SPACE
1-KBYTE RAM
MAP TO ANY 2K SPACE
768 BYTES EEPROM
MAP TO ANY 4K SPACE
REGISTER FOLLOWING
SPACE
512 BYTES RAM
(IF ACTIVE)
BDM
MAP WITH MAPROM BIT
IN MISC REGISTER
OR $8000 – $FFFF
TO $0000 – $7FFF
FLASH EEPROM
$0000
$8000
$FFFF
$7FFF
HC812B32 MEM MAP
MOTOROLA
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