> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of Byron A Jeff
>
> It's not really a foreign concept. The 68HC11 implemented a 
> bootstrap mode. Here's an app note describing it:
>
>Fundamentally it was a blank chip with a bootloader installed.

If you do not want to talk about PIC, yes all the Freescale
68HC908 flash parts have a monitor ROM inside. Even the 8-pin  
MC68HC908QT1/2/4 have the monitor ROM inside. By the way,
68HC05/68HC11/68HC16 are no longer promoted by Freescale. 
Freescale promotes more the 68HC908/HCS08 and 68HC912/HCS12 family.

I need to check out the Freescale USB part since I am not so familiar
with the HC908 parts and I do not like its high active current
consumption compared to PICs and AVRs.

However the design of PIC MCU will not allow Microchip to install
a bootloader inside without occupying programming space. Moreover
many customers will not need the bootloader. And there are many
bootloaders out there.

Regards,
Xiaofan

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