Lpc2000

Hello,
We are developing a battery powered application using LPC2212. And we
have a strange problem with the core current consumption. After the
core went into powerdown mode the core current is about 30uA. Then an
external circuit removes 3.3V for the peripherials, but the core
current consumption rises to 100uA. Any suggestions?

--- In lpc2000@yahoogroups.com, "pavel.rangelov" <pavel.rangelov@...> 
wrote:
>
> Hello,
> We are developing a battery powered application using LPC2212. And we
> have a strange problem with the core current consumption. After the
> core went into powerdown mode the core current is about 30uA. Then an
> external circuit removes 3.3V for the peripherials, but the core
> current consumption rises to 100uA. Any suggestions?
>
You probably have floating pins on the CPU. Add pull-ups or pull-downs 
(10k) to all pins, even the ones not connected, while checking the 
curren consumption. Do this one pin at a time. When you have found the 
offending pins, permanently add the pull-ups or pull-downs.
Lars Marmsater