User's Manual Part 2

Bootloader
Wireless Sensing Triple Axis Reference design, Rev. 0.9
Freescale Semiconductor 47
5.5 Bootloader
There’s bootloader software implemented in MCHC908JW32 microcontroller. The bootloader is based on
AN2295 Application note - Developer’s Serial Bootloader for M68HC08 and HCS08 MCUs and
AN2295SW accompanied software. The original AN2295 bootloader targets serial connections between
the PC and applications, and since the MCHC908JW32 implements a virtual serial port application, the
USB version of the AN2295 bootloader has been created to allow reprogramming of Flash memory in the
USB stick.
The USB virtual serial port software is fully described in
AN3153 Application note - Using the Full-Speed
USB Module on the MCHC908JW32
; the MCHC908JW32 bootloader implements the same virtual serial
port but under a different PID (the PC sees that serial port as a different application from ZSTAR).
The bootloader drivers installation guide can be found in chapter
6.1.2 AN2295 Bootloader Drivers
installation
.