Lpc2000

Hi Tom,

Thanks for the reply. The circuit diagram has P0.14 connected to the com 
port via a jumper. I'll try holding it low manually as suggested by Zdravko.

Do I need to release it before programming? Or, can I leave it tied low 
for the duration of the programming?

Cheers,

Peter.

Tom Walsh wrote:

> Peter Homann wrote:
> 
> 
>>Hi,
>>
>>Can anyone help me with getting my LPC2138 processor to start talking to 
>> the Philips Flash utility again.
>>
>>A previously explained, it appears to have locked up and I can no longer 
>>program it.
>>
>>Is it possible to screw up the boot loader.
>>
>>I'd really appreciate some help here.
>>
>>Cheers,
>>
>>Peter.
>>
>>Peter Homann wrote:
>>
>> 
>>
>>
>>>Hi,
>>>
>>>I've managed to stuff up something, so that my MCB2130 board won't 
>>>communicate with the Philips download utility. I'm not sure what I've 
>>>done. I may have downloaded a hex file for an incorrect processor. Or 
>>>maybe erasing the whole chip erases the boot loader.
>>>
>>>Is there something I can do to get it working again?
>>>
>>>   
>>>
> 
> Hold P0.14 low and reset the chip.  You are probably have a valid 
> checksum in the Flash and it is jump to that program instead of the 
> bootloader.  So, you have to "force" it into the loader.
> 
> TomW
> 
> 

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