I know assembler for 8052 core. So I succesfully make BIN code this example:

======================================
LEDPIN BIT P3.5 ;your favorite port pin (LED preferred)

START CODE 8000H ;start address of user programs

TIME EQU 8 ;time constant in units of 250 ms (for 12 MHz)

ORG START ;program start address

BLINK: CPL LEDPIN ;toggle pin (Great, when connected to a LED!)
MOV R3,#TIME ;wait for TIME * 125 ms (12 MHz)
MOV R2,#0
MOV R1,#0
LOOP: DJNZ R1,LOOP
DJNZ R2,LOOP
DJNZ R3,LOOP
SJMP BLINK ;This is repeated forever,
;if you don't press reset ...
END
=======================================

But I have problem with TUSB3210, because you can't directly download BIN code to EEPROM memory. I use I2C header utility from Texas - the program merge header boot block to BIN file. After that you can download this code to EEPROM. It seems - it's working - but no response on P3.5.

Processor clock are runnig, I2C bus wich is connected to serial EEPROM look likes working.

So I find anyone who works with TUSB3210 processors.

Thanks
Radim