[Coco] 6309/6809 power consumption

[Christopher R. Hawks]

On Thu, 17 Oct 2019 09:01:53 +0000 (UTC)
Roy Justus via Coco <coco at maltedmedia.com> wrote:

> hi  gene nice to hear from you .  As long as you are
> still kickin' I feel there is hope for the rest of us.
>  
>  
>  
> -----Original Message-----
> From: Gene Heskett <gheskett at shentel.net>
> To: coco <coco at maltedmedia.com>
> Sent: Wed, Oct 16, 2019 6:20 pm
> Subject: Re: [Coco] 6309/6809 power consumption
> 
> On Wednesday 16 October 2019 17:16:47 Salvador Garcia via Coco wrote:
> 
> > I can't seem to find how much current these uPs need. I know the
> > 63xx uses less current than its Motorola counterpart, but can't
> > seem to find this information. Can anyone point me in the right
> > direction. Thank you! Salvador
> 
> The HD63C09 is a CMOS functional sorta clone of the 68x09. As a much 
> newer from scratch design, and in CMOS, where the current draw is 
> proportional to the clocking speed, judging by the total lack of heat 
> produced, I'd have to put its current consumption at 20 ma max at the 
> coco3's std clock speed.  The 2 CMOS dimm memory sticks in my 2 meg 
> coco3 warms up a photo thermometer whose stem is laying on the grill 
> above the memory chips shows about 2 degrees F above ambient when 
> running 24/7.  And thats with a furniture blanket covering it.  There 
> simply isn't any great amount of heat generated by the 63C09.
> However, if your memory is the old 1 bit nmos dynamic, 16 of them,
> they'll still warm up, possibly more because the CMOS 63x has rail to
> rail drive, more than the 68x causeing the memory to be a higher load
> drawing more current, and so will the 63c09 due to the higher current
> draw used by their address lines. I've never had that config, so I
> won't hazard a WAG what the diff might be.
> 
> Cheers, Gene Heskett

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Christopher R. Hawks
HAWKSoft
-- 
UNIX is not some crystalline bon-bon for computer scientists to smack
their lips over. It's all a big hack! Get over it! Go back to your
syntax-directed Scheme editor and your pen-and-paper philosophizing!
Leave the rest of us to our Perl hacking and .Xdefaults files.
		-- Garth Snyder, on big-staff at cs.swarthmore.edu
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