Specifications

Developer’s Serial Bootloader, Rev. 13
MCU slave software
Freescale Semiconductor50
8.3 MC68HC908GP
On-chip FLASH programming routines are not available in MC68HC908GP MCU. Therefore, all FLASH
programming must be done by the bootloader, as demonstrated in this section.
MC68HC908GP MCUs are primarily targeted for use with a low-cost 32.768 kHz crystal. Because the
frequency of the crystal is known, no calibration is performed, which saves MCU memory. Therefore, this
MCU uses the Known MCU communication speed method.
The following figure is a flowchart of MC68HC908GP bootloader process: