| ??? 01/10/03 20:24 Read: times |
#36185 - T89C51RD2 with external CODE mem |
Hi all,
I'm trying to run a T89C51RD2 on a board equipped with 32K of EPROM as CODE memory. EA is held low and PSEN is active as one would expect it, but the address bus is simply counting up from 0 to FFFF without executing any code, it seems. Does anyone have any clue as to what may cause this strange behaviour. Any help would be apprecaited! Thanks -uwe |
