Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: LPC2212 Power Hungry?

2004-10-06 by tynerae

I've tried removing the resistor on RTCK, but the difference in 
current draw was negligible. Thx for the thoughts.


--- In lpc2000@yahoogroups.com, "Bill Knight" <BillK@t...> wrote:
> Is the JTAG enabled?  If so, maybe tie the gound end of the JTAG
> enable resistor to a pin on the JTAG connector that will supply
> ground only when the connector is present.  Then set the pins to
> GPIO outputs of the proper voltage in software for when the JTAG
> is not enabled.
> 
> Anyway, just a thought.
> 
> Regards
> -Bill Knight
> theARMPatch
> 
> 
> On Wed, 06 Oct 2004 14:24:37 -0000, tynerae wrote:
> 
> I am working on a design that uses an LPC2212 and need to have 
power 
> consumption minimized. According to the datasheet, the 1.8V draws 
> ~10uA in sleep mode, but I'm seeing 40uA. The EVBA7 comes in at 
5uA 
> using same code. And worse, I'm not able to get the 3.3V draw 
under 
> 1.2mA(EVBA7 is 200uA.) It needs to be pretty much nil. I have 
turned 
> off all peripheral power using  REG(SYSCON_PCONP) = 0x00000000; I 
> have been able to reduce the 3.3V draw from 3.5mA by turning off 
the 
> external memory controller and disconnecting the memory bus and 
> debug port using PINSEL2. I've tried to set all peripheral 
functions 
> to GPIO.  I don't think I'm driving anything else on the board 
with 
> 3.3V. I've pulled practically every load to check, but no dice. 
> Any thoughts/ideas?
> Thx

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.