Lpc2000

On 21 Dec 2004 at 9:41, Zdravko wrote:

> 
> 
> Hello,
> I am going to use LPC2214.
> I have some questions which are not clear for me in the User Manual.
> 
> 
> 1) Can I use the not used external memory bus address lines as GPIO
> (A0 and A1 are directly mentioned in the UM but the others not)? 3)

Yes you can, but you must be careful. You cannot arbitrarily choose if
a pin is an address line or GPIO. You can for instance choose to use the bottom
8 lines as address lines and the rest as GPIO.  (Or bottom 16 and rest as GPIO).
There are only a number of combinations allowed. 

> What are the limiting values of the voltage on the pins when the 3.3V
> for the external rail is not present(The 1.8V for the core will be on
> all the time)?

Sorry - cannot help you with this.

Regards
   Anton Erasmus


-- 
A J Erasmus