Lpc2000

Hi Bob,

as a general rule, what is not assigned to an alternate function will
still be general purpose I/O.  

In fact , you have more I/O pins on this device as compared to e.g.
the Atmel SAM7 because that device has more dedicated pins such as
debug pins and analog inputs. Overall, I like the flexiibility of the
LPC2000 series better.

hth Bob

--- In lpc2000@yahoogroups.com, "bobtransformer" <bgudgel@e...> wrote:
> 
> 
> I have been excited about trying the LPC2114 and LPC2124 parts (and 
> similar parts) and notice in the users manual that when certain pins 
> are assigned certain functions, other pins cannot be used for general 
> IO etc.
> 
> I am used to Microchip and AVR type parts where any pin can pretty 
> much be assigned to be used as general IO or the alternate dedicated  
> pin functions (TXD, RXD, PWM, cap, int, etc.)
> 
> Is it really true that these parts have this limited pin usage ?
> For instance, it looks like I cannot use UART0 and UART1 and still 
> use PWM outputs 2 and 5 even though neither function shares pins.
> 
> I also see a lot of "reserved" pins when certain pin functions are 
> assigned that would waste otherwise useful IO.  This would severely 
> limit usage of these parts.
> 
> This can't be true, can it ? 
> thanks,
> bob