Hi to all the ng
Can you help me please? I mounted at home a board using an ADUC842.I comunicate with PC by means of a simple RS232 to TTL converter as shown in http://157.158.56.13/Electronics_Firm_Docs/ANALOG/uC006.pdf
The 32768 KHz Xtal oscillates,i have connected digital and analogs VDD's.EA is tied to High logic level
When i exit from RESET state presenting PSEN Low the ADUC sends the correct string to the PC.
The problem arises when i ask from PC to ADUC to identify itself,this is done by sending four chars :0x21 0x5A 0x00 0x6 as stated by App.Note uc004
the ADUC should respond immediately,but nothing happens.Is my AdUC broken or am i making some mistake?
Many thanks
Diego
Italy