Lpc2000

I'm sorry tosay you are on the wrong track: a processor running stand 
alone with no I/O is useless!!!!

Just kidding. :D

Guille

--- In lpc2000@yahoogroups.com, "pitstock_kiwi" <keith@...> wrote:
>
> 
> I am setting up my schematic for an LPC2148 board.
> 
> Heres my take on the minimum connections to make the chip power up 
> and run.
> 
> Obviously connect all the 3.3v and 0v connections as per data 
sheet. 
> Add a clock source. I am more interested in ports here.
> 
> 
> What I have established so far is.
> 
> P0.14 - Pull up to avoid bootload mode.
> P0.31 - Do not pull down as per errata. (pull up is internal)
> P1.20 - Do not pull down or you get trace mode. (pull up is 
internal)
> P1.26 - Do not pull down or enables debug ports. (pull up is 
internal)
> 
> So basically I can connect a single pull up to P0.14 and have no 
> connects on P0.31 P1.20 P1.26. Connect a 12mhz crystal and 22pf 
caps 
> (per my case). Connect power and gnd to appropriate pins. 
> and the chip should run (assuming it has a program loaded.)
> 
> The data sheet features say "Single power supply chip with Power-On 
> Reset (POR) and BOD circuits" : Which to me means no connection on 
> the Reset pin is ok too as it has internal (POR) "power on reset" 
and 
> (BOD) "brown out detector". I will place pads as pet the Keil 
MCB1240 
> for and RC on the Reset pin as an option.
> 
> Does this all sound right or am I am on the wrong track?
> 
> Cheers
> Kiwi Keith
>