Correct I made mistake and it is linear not exponential. On Fri, Aug 18, 2023, 9:45 PM jwet <[email protected]> wrote:
> Supply current rises linearly with clock rate. > I =CVF, c is the "dissipation" capacitance = total C of swinging nodes, v > is swing and F is clock rate. There is a small constant leakage that > creates an intercept. The only power is just charging discharging the bus. > > > > > Sent from my Verizon, Samsung Galaxy smartphone > > > -------- Original message -------- > From: Trampas Stern via TriEmbed <[email protected]> > Date: 8/17/23 9:11 AM (GMT-09:00) > To: Peter Soper <[email protected]> > Cc: Triangle Embedded Interest Group <[email protected]> > Subject: Re: [TriEmbed] Raspberry Pi idle current vs clock rate(s) > > There are other chips consuming power beyond the processor: > https://forums.raspberrypi.com/viewtopic.php?t=152692 > > LAN > WIFI > HDMI > etc > > Typically power increases exponentially with clock rate. However I bet > the OS internally is sleeping the processor when idle, effectively dropping > clock rate. I doubt your power will drop significantly by underclocking at > idle unless you disable other chips and peripherals. > > This most likely does not solve your problem but might answer > your question. > > Trampas > > On Thu, Aug 17, 2023 at 1:03 PM Trampas Stern <[email protected]> wrote: > >> https://www.pidramble.com/wiki/benchmarks/power-consumption >> >> >> >> On Thu, Aug 17, 2023 at 12:54 PM Peter Soper via TriEmbed < >> [email protected]> wrote: >> >>> Can anybody speak to this? I'm told (by an eager word-guesser aka "ai") >>> that a Pi 4 idles around 575mA. If I drop the clock from 1200 to 600mHz (as >>> low as it will go if my other info is right) I wonder if this will cut the >>> idle current in half or is it likely to be a larger fraction? >>> >>> Pete >>> _______________________________________________ >>> Triangle, NC Embedded Interest Group mailing list >>> >>> To post message: [email protected] >>> List info: >>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org >>> TriEmbed web site: https://TriEmbed.org >>> To unsubscribe, click link and send a blank message: mailto: >>> [email protected]?subject=unsubscribe >>> Searchable email archive available at >>> https://www.mail-archive.com/[email protected]/ >>> >>>
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