AN2295 Freescale Semiconductor / Motorola, AN2295 Datasheet - Page 43

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

MCU Slave Software
Because the memory map is not contiguous, FC protocol version 3 must be used (it allows the “holes” in
the memory map, i.e., several separate memory blocks).
MC9S08GB/GT
MC9S08GB/GT devices are the first members of the HCS08 Family. Because of different hardware
features and FLASH memory allocation, another version of the protocol was required. The protocol is
detected automatically by the latest hc08sprg.exe PC master software and becomes invisible to the
user.
MC9S08GB/GT MCUs have two SCIs (the SCI channel must be selected at compile time).
These MCUs have no on-chip FLASH programming routines. Therefore, all FLASH programming must
be done by the bootloader and is demonstrated in this implementation (it has been entirely adopted from
HCS08 Family Reference Manual Volume 1 (Freescale Semiconductor order number HCS08RMv1/D;
see References).
Developer’s Serial Bootloader for M68HC08 and HCS08 MCUs, Rev. 6
Freescale Semiconductor
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