AN2295 Freescale Semiconductor / Motorola, AN2295 Datasheet - Page 13

• Manufacturer Part Number: AN2295
• Description: Developers Serial Bootloader for M68HC08 and HCS08 MCUs
• Manufacturer: Freescale Semiconductor / Motorola

FC Protocol, Version 1, M68HC908 Implementation
This section describes features that are specific to the M68HC908 bootloader implementation. The
memory allocation is heavily MCU specific, so the meaning of all variables is explained in this section in
detail.
Figure 14
pre-programmed. For example, the MC68HC908KX8 MCU memory map includes:
Freescale Semiconductor
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7680 bytes of FLASH memory ($E000–$FDFF)
192 bytes of random-access memory (RAM) ($0040–$00FF)
36 bytes of user-defined vectors ($FFDC–$FFFF)
INTERRUPT VECTOR TABLE
UNIMPLEMENTED AREA
BOOTLOADER CODE
BOOTLOADER USER TABLE
FREE MEMORY AREA
FOR USER CODE
UNIMPLEMENTED AREA
RAM
I/O REGISTERS
shows the typical memory allocation for M68HC908 MCUs with the bootloader
Figure 14. Simplified Example of Memory Allocation in MC68HC908KX8
Developer’s Serial Bootloader for M68HC08 and HCS08 MCUs, Rev. 6
0xFFFF
0xFFDC
0xFE00
0xFCC0
0xFC80
0xE000
0x0100
0x0040
0x0000
THIS AREA OF FLASH IS PROTECTED
USING FLBPR REGISTER
FLASH MEMORY AVAILABLE
FOR USER CODE
FC Protocol, Version 1, M68HC908 Implementation
FLASH MEMORY AVAILABLE
ON MC68HC908KX8 MCU
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