[Arm-netbook] MIPI?

[Alexander Stephen Thomas Ross]

what does it mean for EOMA that small high res displays are switching to
MIPI?


Context: I was chating to some techys and that was a problem with the
display interface of EOMA but then I think I said eoma was lvds when
it's this rbg/ttl thing. I got confused. I did say eoma was rbg/ttl
later but I didn't get a reply regarding that so I don't know. I don't
know what I'm talking about hardware wise. (I did tell them.).

[Luke Kenneth Casson Leighton]

On Thu, Apr 10, 2014 at 5:29 AM, Alexander Stephen Thomas Ross

Post by Alexander Stephen Thomas Ross
what does it mean for EOMA that small high res displays are switching to
MIPI?

if you look at the list of available LCDs on http://panelook.com, go
to "Advanced", select "MIPI" interface (top right), you see that on
the world's largest web site which lists LCD panels globally available
there are *only* 180 MIPI panels listed. that's gone up in 1 year
from around 85 [gosh!! a 100% increase! woooow :) ]

by contrast if you select LVDS that number goes up to 1,900.

if you select Parallel RGB (which automatically gives you all the
480x272, 800x600 and 640x480 LCDs) that number is over 700 LCDs.

remember however that EOMA is *NOT* "a single standard". EOMA68 is
targetted at one market, other EOMA standards are targetted at others.

so once we get going (once there are some sales of the EOMA68-A20 CPU
Card) we will have the cash to fund "high end" prototype cards that
will take advantage of the MIPI / eDP standards.

l.

[Alexander Stephen Thomas Ross]

ok, I get it. :)

I see I've made the mistake for referring to the general eoma standards
when I was asking about a particular one - eoma-86!

so in summary small screens that are eoma-86 compatible are only low res
ones.

I guess eoma-cf would be higher end?

Thanks again.

[Luke Kenneth Casson Leighton]

On Thu, Apr 10, 2014 at 3:25 PM, Alexander Stephen Thomas Ross

Post by Alexander Stephen Thomas Ross
ok, I get it. :)
I see I've made the mistake for referring to the general eoma standards
when I was asking about a particular one - eoma-86!

68

Post by Alexander Stephen Thomas Ross
so in summary small screens that are eoma-86

68

Post by Alexander Stephen Thomas Ross
compatible are only low res ones.

yes, meaning that a low-cost device based on an EOMA68 CPU card would
actually *be* low-cost, by virtue of not needing:

a) an ultra-expensive screen
b) an ultra-expensive converter chip (e.g. MIPI to RGB/TTL)

for larger screens ($20 to $25 for a 7in 1024x600 or $25 to $30 for a
10in 1280x800) these are typically LVDS and we may add $1 for an
SN75LVDS83b RGB/TTL-to-LVDS converter IC without too much fuss.

by the time you get to Dual LVDS these are quite expensive relatively
speaking as well and the cost of RGB/TTL-to-Dual-LVDS converter ICs
again may be absorbed.

Post by Alexander Stephen Thomas Ross
I guess eoma-cf would be higher end?

yes. i think there, specifying MIPI or eDP is probably a good idea
because the kinds of CPUs that will go in such a small package are
those in embedded mobile space anyway.

l.