MC68HC912BL16 Datasheet, PDF (31/128 Pages) Freescale Semiconductor, Inc – 16-Bit Microcontroller

Freescale Semiconductor, Inc.
ROMON — Enable Flash EEPROM
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.
0 = Disables the Flash EEPROM in the memory map
1 = Enables the Flash EEPROM in the memory map
5.4 Memory Maps
The following diagrams illustrate the memory map for each mode of operation immediately after reset.
$0000
$0800
$0E00
$8000
$C000
$0000 _REGISTERS
512 BYTES RAM
$01FF MAPTOANY2KSPACE
$0200 _{REGISTER FOLLOWING}
SPACE
$03FF ^{512 BYTES RAM}
$0800
512 BYTE RAM
MAPTO ANY 2K SPACE
$09FF
$0E00
512 BYTES EEPROM
MAPTO ANY 4K SPACE
$0FFF
$4000
$7FFF
FLASH EEPROM
MAPWITHMAPROM BIT
IN MISC REGISTER
TO $4000 – $7FFF
OR $C000 – $FFFF
$C000
$F000
$FF00
$FFC0
$FFFF
VECTORS
EXPANDED
VECTORS
SINGLE CHIP
NORMAL
VECTORS
SINGLE CHIP
SPECIAL
$FF00
BDM
(IF ACTIVE)
$FFFF
Figure 6 MC68HC912BL16 Memory Map
$FFFF
HC912BL16 MEM MAP
MC68HC912BL16TS/D
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