Jan-Erik Soderholm 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 ?

Maybe not in de older versions, those grey boxes are sometimes added lateron

Anyway, thanx! I did not find the PORT chapter where I assumed it to be 
(near the start of the document, where it is in 16F datahseets), so I 
looked only in the USB chapter. Now I know the 18F datasheets do have a 
PORT chapter, so in the future I sure will find it!

-- 

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
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