problems with P89C51RD2BA

[erikm]

>>The chip is being programmed and once it is plugged into the target board only the ports are working and nothing is working like memory access,lcd etc. are not working including the RS232 port.<<

Did you take care of the other differences (variable timer clocking etc)?

Erik

[Andy Ayre]

Chander - did you implement the reset workaround on the errata sheet for the P89C51Rx2?

[KE NG]

I had a program which download though FLASH MAGIC into P89C51RD2BA
since that everything is fine or loaded into FLASH RAM.

But the program doesn't work.

The same Hex code I was load to Other device P89C52UB is working fine.

Any suggestion?

Thank
KE NG

[erikm]

did you:
run at the same clocking (12)
change the SFR addresses to match the different derivative
verify that your doenload procedure works

Erik

[Jan Waclawek]

Is the status byte clear (if not, it enters ISP rather than user program).
Is the PSEN floating? (if tied low, it enters ISP rather than user program).

Jan Waclawek

[JASMI]

PLZ GET ME ERRATASHEET OF 89C51RD2BN

[erikm]

PLZ GET ME ERRATASHEET OF 89C51RD2BN

1) you SHOUT, 2 you use Stupid Monkey **** (PLZ) so why would anyone feel like helping you?

Erik