> how to upload *.hex into this 2051 while it is already soldered in the
> experiment board?
>
> can 'on-line' uploading *.hex via serial port just like Philips LPC 2106
> ?
>
>
>
Get a copy of the data sheet such as at:
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it is detailed. The PCB your device is soldered to appears to be just a DIP carrier, which should make it relatively easy to connect to.
This site has a few more resources that may be of use:
formatting link
as is this:
formatting link
Cheers.
Ken