OESF | ELSI | pdaXrom | OpenZaurus | Zaurus Themes | Community Links | Ibiblio

IPB

Welcome Guest ( Log In | Register )

4 Pages V  < 1 2 3 4 >  
Reply to this topicStart new topic
> Parts List, A rough guide to the chipsets we will us
Da_Blitz
post Mar 19 2007, 02:39 AM
Post #31





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



ok i decided to lump a couple of things into this next section, a USB PHY because its easy, the DDR RAM because its a JDEC standard, so all ddr ram chips of the same capacity use the same pinout (and theni can match it to the power supervisor), look at the CPu and what it needs and thats it

after that its flash (im looking at samsung) buletooth, wifi then the phone part

if i forgot somthing please post, im having a mental itch that i cant place
Go to the top of the page
 
+Quote Post
Da_Blitz
post Mar 19 2007, 04:44 AM
Post #32





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



Ok found this from cypress: http://www.cypress.com/portal/server.pt?sp...l&showall=false

its a usb transreciver (PHY) that we need for all off board comms (ie OTG or USB Host)

ddr ram is fine, its a 1.8v chipset witha max power disipation of 1W (basically if the cip is fried), and 150ma max current draw (270mW max under normal conditions)

as for the power budget, at the moment i am working on 4.1v @ 2000maH so 8.2W times that by the effcincy of the power supervisor (90%) and we get 7.38W, thats a handy figure to know however what is more intresting is the 8.2W rating, it allows us to detirmine runtime smile.gif

8.2/<total board current draw> = runtime in hours

so if we had 4 ram chips (256MB of RAM) the battery could power the ram for 8 hours aprox (8.2/(270*4) ~ 8 hours)

cant find the cpu current draw anywhere (quite bizare that they wouldnt mention that) but keep in mind all my calcs are for Maximum current draw or worst case senario (ie like a c1000 @ 624Mhz playing moives)
Go to the top of the page
 
+Quote Post
speculatrix
post Mar 19 2007, 12:53 PM
Post #33





Group: Admin
Posts: 3,281
Joined: 29-July 04
From: Cambridge, England
Member No.: 4,149



QUOTE(Da_Blitz @ Mar 19 2007, 11:36 AM)
and they normally pack extra goodies (the freescale one has audio in and out, a RTC, power on at certin times of day, lithium ion charger and a USB PHY that supports client and host, but requires an NDA so it wont happen sad.gif)
*


don't entirely write off the chip - the NDA might only be temporary if it's freshly out, as they may simply want to track who's trying to use it to ensure that any changes to the device can be tracked by customers.
Go to the top of the page
 
+Quote Post
Da_Blitz
post Mar 19 2007, 05:52 PM
Post #34





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



well considering the imx already has a RTC built in its mainly tho transreciver and the audio stuff which is easy to cover elsewhere

natinol semi also offering pricing and samples also pushes it up as well
Go to the top of the page
 
+Quote Post
Ragnorok
post Jun 13 2007, 05:12 PM
Post #35





Group: Members
Posts: 298
Joined: 27-October 03
From: Greenfield, NH
Member No.: 781



- Could we bump the battery capacity or is 2Ah all there's space for?

- The cypress.com thing says USB is suspended while on battery. Can that be right? What's the point of having a connector that's unusable when it's not plugged in? Or do you have some razzle-dazzle to address that and I'm simply not understanding?

- That power chip looks spiff. And less than three bucks per. Sweet!...
Go to the top of the page
 
+Quote Post
Da_Blitz
post Jun 13 2007, 10:14 PM
Post #36





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



i had an idea or two to put a large battery in there and add more capacity by having a thin teminal and a unit with no display connected by somthing wireless.

that way you only deal with the thinner client that i suppose could charge off the main unit so it only needs a stardard battery (when not in use doc it) and have the other unit as a 3d arrangement of boards (ie common bus, just buy the modules you want) so you can pack it with any IO options you want or as much storage as you want

just keep that werever handy. i liked this idea because it then becomes a central store for your files, if you can connect you PC to it then it would charge but give you acsess to your docs or if you had X set up then you could login and run your apps more securly

however i dont think people would like that idea, but to me its like a bluetooth headset and a mobile, except its not a voice thin terminal

not sure about the usb thing, i didnt qutie catch the drift of that. can you reexplain it (i will take a look at it again latter, been awhile scince i slept)
Go to the top of the page
 
+Quote Post
Ragnorok
post Jun 14 2007, 06:25 PM
Post #37





Group: Members
Posts: 298
Joined: 27-October 03
From: Greenfield, NH
Member No.: 781



QUOTE
(USB is in suspend mode when the handheld is being powered from the battery)
- This appears on the page you link to above, about they cypress USB module. Of course it has the lowest power consumption in the industry ... it's turn off unless it's plugged in! (grin) I haven't read the data sheet for clarification on that, though.

QUOTE
a thin teminal and a unit with no display connected by somthing wireless
- I'd be against this because I don't trust wireless to be secure. If it is secure, too much of the precious resources (power, etc) are consumed enabling that security, and reducing available bandwidth, tanking response time. I'm not against it from an ergonometric perspective, and it sounds pretty cool otherwise...
Go to the top of the page
 
+Quote Post
Da_Blitz
post Jun 15 2007, 03:47 AM
Post #38





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



but why would you want the usb module to be on if its not in use?

i dont belive in encryption in the lower OSI layers. i dont know how much it will chew into the power budget but i do know it wont reduce bandwidth. it still needs work but all tehes ideas are partof a larger one to basically make computers "wearable" and make them disappear
Go to the top of the page
 
+Quote Post
Ragnorok
post Jun 27 2007, 01:13 PM
Post #39





Group: Members
Posts: 298
Joined: 27-October 03
From: Greenfield, NH
Member No.: 781



USB: The specs made it look like the unit is offline if not plugged into mains, as opposed to not plugged into an USB device. I don't see the utility of having an USB that won't work unless the PP is plugged into the wall.

WIRELESS: I don't see how one could secure comm amongst a distributed wearable system without putting the encryption at a pretty low level. I'm all for preventing random sniffing from seeing what's on my display or accessing my storage. There's too much potential for abuse if things aren't locked down.
- I would also think the transmitters would take more power to drive than wires, further penalizing battery life.
- I don't see the win here, other than the "cool" factor. Or am I missing something?
Go to the top of the page
 
+Quote Post
wsuetholz
post Jun 28 2007, 09:26 AM
Post #40





Group: Members
Posts: 64
Joined: 19-July 06
Member No.: 10,462



Fujitsu E-Paper Display

This would be so cool to use, if it was available.

Could you imagine using something like it for the keyboard keys... When you press the Shift key the keyboard would adjust to show the proper characters, or even the FN key or Alt.
Go to the top of the page
 
+Quote Post
Da_Blitz
post Jun 29 2007, 04:55 AM
Post #41





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



wireless is good because its convinient, but i do like high bandwidth wires (and low latency)

ideal world would be a bat belt design with extendable cables and wireless for everything else. say an apen wifi acsess point so you can do public file serving and vpn acsess for any of teh real services (might as well just bridge the ethernet and wifi together then bring up the ip on the bridge connection, solves some problems and creates a copule more)

i really must dig up my notes on the design plan for the software layout
Go to the top of the page
 
+Quote Post
wsuetholz
post Jul 13 2007, 11:09 AM
Post #42





Group: Members
Posts: 64
Joined: 19-July 06
Member No.: 10,462



QUOTE(wsuetholz @ Jun 28 2007, 12:26 PM)
Fujitsu E-Paper Display

This would be so cool to use, if it was available.

Could you imagine using something like it for the keyboard keys... When you press the Shift key the keyboard would adjust to show the proper characters, or even the FN key or Alt.
*



Here's something that looks cool.. Unfortunately, color E-Paper besides being a nonproduct at this time, has a very slow refresh rate.

Origami DVD Player

Origami Cell Phone
Go to the top of the page
 
+Quote Post
Da_Blitz
post Aug 25 2007, 06:04 AM
Post #43





Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



looked at this thread for some refrence material and did some rechecking of chips

looks like that linear devices chip (that dose usb and inpu power handeleing) fits well with a uC supivisor controller chip (ok not really a suporvisor chip but it does have programable outputs which is what i want)

for ref:
http://www.linear.com/pc/productDetail.jsp...78,C1089,P21672
http://www.freescale.com/webapp/sps/site/p...p?code=MPC18730

that takes care of any to all power problems i have at the moment, has a tiny part count (less than 20 passives in total) and is fairly flexible, only problem i see is making sure the correct voltage is avalible on boot, reading the docs now. perhaps it can be hard coded otherwise i will chuck a pic in there (planing to anyway)

the atmel fingerprint reader looks good as well, acts as a mouse which is a handy feature, know i am undecidede about this but the fact that it could be used as a mouse makes it more useful, and it defnattly is good as a quick unlock feautre

ref:
http://www.atmel.com/dyn/products/product_...sp?part_id=3609

had another look at the i.mx31 flash interface and the good news is that it can do more than 2GB of ram. i discovered it dosent map it into main mem but instead you make a request to the nand controller and then puts the page you want in the 2K of sram designated as the buffer, it says glueless up to 2GB so it shouldnt be too hard to extend that for those who want it wink.gif

as for audio the micronos stuff is good. but it dosent state how to get them

ref:
http://www.micronas.com/products/by_functi...tion/index.html
http://www.micronas.com/products/by_functi...tion/index.html

i think the big win is the power stuff,both chips are avalible as samples and you can buy them direct from manufaturer, so far total projected cost for the power subsytem is about $10USD
Go to the top of the page
 
+Quote Post
speculatrix
post Aug 28 2007, 02:34 PM
Post #44





Group: Admin
Posts: 3,281
Joined: 29-July 04
From: Cambridge, England
Member No.: 4,149



great, so when can I buy a PP?
Go to the top of the page
 
+Quote Post
Ferret-Simpson
post Sep 15 2007, 02:28 AM
Post #45





Group: Members
Posts: 573
Joined: 8-June 05
Member No.: 7,295



According to the original timescale, about 9 months ago?

Lets be honest here, DB. No marketspeak, no insane ideas about wearable computing or wireless thin cleant crap.

The original idea was for:

An upgraded and open source Zaurus-3200 and HTC-Universal intermix. I've been using the Universal for a year now, and I'm perfectly happy with it. The linux port is reaching maturity - when we started this it couldn't use the screen.

I hate to say it, especially since I was one of the primary proponents around the inception; But this is NEVER going to get done. If anything does, it'll be nothing like the original idea which was to replace the Zaurus BEFORE they stopped making it, in order to encourage Sharp to actually upgrade the machine. That plan is over. There are readily available devices that cater for most of our individual needs, and with SDIO support partially available we might see that those last few are completed as well.

Wouldn't it be more sensible to stop wasting time on the vaporware dream of the "PocketPenguin" and work on something more constructive, like porting software to the devices we DO have?

Enough's enough, guys.

Graham Simpson.
Go to the top of the page
 
+Quote Post

4 Pages V  < 1 2 3 4 >
Reply to this topicStart new topic
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 20th December 2014 - 04:27 PM