Lpc2000

Just for discussion.  Usualy most microcontroller manufacturers have 
recomendations about unused pins settings.  I did not find any for 
the LPC2129.  So I decided to program all P0 unused pins as outputs 
and P1 pins as inputs, because the P1 pins have inside pullups.
Any notes?

Thank you,
Varuzhan

Hi, all!

We have a project featuring LPC2138 and we would like to keep power 
consumption to minimum levels when possible. Now the issue of what to 
do with unused pins opens a couple of questions. I'd normally connect 
all unused GPIO pins to GND, but some of them (P1 in particular) have 
internal pull-ups. Wouldn't a GND connection on them draw a significant 
current in these pins? Up to 85 µA per pin is 16x85µA=1.36mA (worst 
case scenario). Should I connect them to VDD instead? If I use 
LPC2148... what should I do with D+ and D-? Connect them to GND too?

Thanks in advance,

Guille

I don't know much about the pin levels you asked about, but I wanted
to make sure you know that the new 2103 has a much more favorable
power profile. The added new power-down modes and they turn off some
internal modules when they're not needed. No USB, but they can be very
attractive for battery operation. And they're cheap!

Thanks, Eric, but I really need those 512K of Flash that LPC21x8 offer. 
I was unaware of 2103, however. I'll keep it in mind for future 
projects.

Guille

--- In lpc2000@yahoogroups.com, "Eric Engler" <englere.geo@y...> wrote:

>
> I don't know much about the pin levels you asked about, but I wanted
> to make sure you know that the new 2103 has a much more favorable
> power profile. The added new power-down modes and they turn off some
> internal modules when they're not needed. No USB, but they can be very
> attractive for battery operation. And they're cheap!
>