hi,

I cannot access Atmel site for some hours - it is in down. But here I have next files downloaded from there:

t89c51rd2-dev_tools3bc6bea39b5cb.zip - contains bootloader hex image and API source codes. I think you know how look at program placed into hex file (=

at89c51rd2-fa-uart-1_0_0.zip - source codes of example about how to use API/bootloader (it has defined entry points as well).

By the way, I have no idea is bootloader of T89C51RD2 different from AT89C51RD2 one. But due their versions numbers are the same (1.0.0) so I think they are equal. At least addresses of entry points must be kept same.

Regards,
Oleg