Lpc2000

Thanks Joel for the reference.  You actually mean uA rather than mA.  
I got the 60-70uA from "LPC213xpower.pdf" in the "files" area of this 
group.  Jeff.

--- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote:
>
> > My last project used an LPC2138.  My next project is battery 
powered
> > and must be able to sleep then wake up each hour.  From reading 
various
> > posts it looks like the LPC takes about 60-70uA when operating in 
deep
> > sleep with RTC enabled.
> 
> LPC213x data sheet excerpt:
> IBAT // Power-down mode supply current // VBAT
> RTC clock = 32 kHz (from RTXC pins), Ta = +25 °C
> VDD = 3.0 V, VBAT = 2.5 V - 14 - mA
> VDD = 3.0 V, VBAT = 3.0 V - 16 - mA
> VDD = 3.3 V, VBAT = 3.3 V - 18 - mA
> VDD = 3.6 V, VBAT = 3.6 V - 20 - mA
> 
> You should be able to take advantage of this with a scheme like 
this:
> 1. Use RTC to generate desired hourly alarm interrupt
> 2. Set RTCWAKE bit in INTWAKE to enable alarm wake up
> 3. Power down part via PD bit in PCON
> 
> Perhaps there is variation in this for the LPC214x and the 
LPC2101/2/3.
> 
> 
> Joel
>