Author Topic: problems with P89C51RD2BA  (Read 25665 times)

erikm

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Re: problems with P89C51RD2BA
« Reply #30 on: April 07, 2004, 09:55:32 am »
>>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

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Re: problems with P89C51RD2BA
« Reply #31 on: April 09, 2004, 09:56:44 am »
Chander - did you implement the reset workaround on the errata sheet for the P89C51Rx2?

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KE NG

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Re: problems with P89C51RD2BA
« Reply #32 on: July 13, 2005, 04:51:27 am »
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

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Re: problems with P89C51RD2BA
« Reply #33 on: July 13, 2005, 05:10:56 am »
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

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Re: problems with P89C51RD2BA
« Reply #34 on: July 13, 2005, 05:22:34 am »
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

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Re: problems with P89C51RD2BN
« Reply #35 on: September 01, 2005, 02:51:58 am »
PLZ GET ME ERRATASHEET OF 89C51RD2BN

erikm

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Re: problems with P89C51RD2BA
« Reply #36 on: September 01, 2005, 05:52:09 am »
PLZ GET ME ERRATASHEET OF 89C51RD2BN

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

Erik