On Fri, 28 Aug 2009 21:33:33 +0200, you wrote:

>Terry Harris wrote:
>> On Fri, 28 Aug 2009 20:33:07 +0200, you wrote:
>> 
>>> I am trying to use the RC4 and RC5 pins of an 18F2550 as inputs. The 
>>> normal use of these pins is as USB data pins, but the datasheet seems to 
>>> state that they can also be digital inputs (but not outputs). Has anyone 
>>> done this succesfully? Any settings required, beyond UCON=0 ?
>> 
>> An old 18F4550 project of mine contains the following 
>> 
>>     // Undocumented by Microchip the disabled (power on default) USB
>>     // subsystem must have the internal transceiver disabled to use
>>     // RC4 and RC5 as digital inputs.
>>     UCFG = 0x08;
>> 
>
>"Undocumented" ?
>Isn't that was is described in the PORTC chapter ?
 
It wasn't documented in 2005 which wasted about a day of my life.
 

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