Technical Details

iPOD video 5th/5.5th power diagram:

ipod_power_diagram

Limitations:

  • USB port can only supply 500mA of current.
  • TEA1211 up/Down converter can supply 1700mA of current on 3.3 rail, however, the schottky diode in the iPOD is of a very small SMD package, the current rating is definitely less than 1A, though technical specs is unknown. Judging from the inductor size,  it is likely will saturate at 1A load.
  • The lithium ion battery in iPOD is about 500mAh for 30GB thin case model and 800mAh for 60/80GB thick case model.  A discharge rate more than 1C, ie. 500mA or 800mA is problematic.

mSATA & Adapter Diagram

mSata_adapter

 

Power requirement:

  • Under typical condition, JM20330 bridge IC requires about 58mA on 1.8V and 73mA on 3.3V, two diode junction drop is used to produce the 1.8V power for JM20330.
  • M500 SSD 240GB active average power consumption is 150mw, however, maximum requirement is 3200mW, that’s about 1A on 3.3V power rail.
  • Thus  there is a 1.1A peak current requirement on 3.3V rail from the SSD & adapter, on average condition 200mA is required.

Issues with typical mSATA ATA adapter board:

  • 1.8V digital core power is not very stable, especially when  3.3V power rail is stressed at peak mSATA activities.  1.65V is observed on the 1.8V line during disk activities. A LDO mod (such as 1117-1.8) will work better or ideally,  switched buck converter replacement.
  • The adapter board’ 10uF x7r decoupling capacitor maybe inadequate  and can be replaced with 47uF tantalum capacitors.
  • Tx RX differential pairs are not well routed, in terms of trace spacing and width. The impedance on these line is questionable.
  • Grounding is not well considered in the current adapter design.

The power issue coupled with the doubtful quality bridge adapter design might be the source of instability observed on previous MOD.

Rockbox Firmware Patch

The official rockbox firmware have issues on error recovery handling, thus failed to work with mSATA SSD mod. Firmware was subsequently patched to correct the error handling problem. UDMA-4 is enabled in the patch, which provides excellent aligned disk transfer.

test_disk SPEED TEST
CPU clock: 30000000 Hz
--------------------
Create: 26 files/s
Open: 716 files/s
Dirscan: 80024 files/s
Delete: 73 files/s
--------------------
Create (512,A): 2781 KB/s
Write (512,A): 2847 KB/s
Read (512,A): 1562 KB/s
--------------------
Create (512,U): 2349 KB/s
Write (512,U): 2397 KB/s
Read (512,U): 1364 KB/s
--------------------
Create (4096,A): 8316 KB/s
Write (4096,A): 8573 KB/s
Read (4096,A): 9418 KB/s
--------------------
Create (4096,U): 3708 KB/s
Write (4096,U): 3791 KB/s
Read (4096,U): 1929 KB/s
--------------------
Create (1048576,A): 12405 KB/s
Write (1048576,A): 12813 KB/s
Read (1048576,A): 41642 KB/s
--------------------
Create (1048576,U): 4258 KB/s
Write (1048576,U): 4313 KB/s
Read (1048576,U): 2080 KB/s

Notice the 41642KB/s aligned 1MB transfer,which can only be achieved with the SSD. UDMA-4 theoretical transfer rate is 66MB/s. Dirscan of : 80024 files/s is also a huge boost, comparing to 10k file/s typical on stock iPod with Rockbox firmware.

30K songs totaling 180GB was transfered to the moded iPod, database was successfully updated in about 8 minutes.

25hrs of continuous playback time is achieved on my dual battery moded iPod.

Rockbox Firmware

References

  1. m500_msata_ssd
  2. JM20330_Spec_Rev. 2.3
  3. tea1211 Datasheet
  4. MKxx10GAHGAL Datasheet
  5. Head-Fi ipod ssd mod thread

347 thoughts on “Technical Details

  1. Pusat Grosir Mukena Bali

    There has been an outcry about how expensive
    everything is, including apparel. Together with the present situation, finding stylish attire
    being sold at an affordable price could be very tricky it, although ladies love to dress up.
    If you’re a lady seeking cheap but stylish girls clothing,
    you should look at purchasing them. By doing this , you do not have to push your self to the
    wall trying to cover that ensemble which you therefore desire.

    Check out my site – Pusat Grosir Mukena Bali

  2. 5linx

    Apart from this you also earn through your commissions as an person and as a member of a crew.
    I know some people mix it with oatmeal and make protein cookies out of it.
    Well, mainly because it is tricky to differentiate your products
    and solutions from other providers this sort of
    as Herbalife, Pharmanex, Usana, Noni, or any of the other
    hundreds of herbal supplement Multi level marketing companies about the planet.

  3. Margarette

    New varieties of custom-made styles can be formed with
    these magnificent accompanying items. And it’s no
    longer just natural browns and black’s people are going for they are experimenting with all
    sorts of colors, pink blues and purples. All Water Works dyes have gold or violet bases, ensuring
    that color does not come out with any green casts or undertones.

    Here is my web-site; hair color styles (Margarette)

  4. vemma

    They should be relatively challenging, but you should ensure that you can meet them, with a
    minimum of pain, every time. I know some people mix it with oatmeal and make
    protein cookies out of it. What is fascinating is that their shakes actually works and delivers some wonderful
    results.

  5. medical equipment kent wa

    His opponents, centered around Faulkner’s widow, assert that Abu-Jamal is guilty.
    OK, so what’s the subsequent essential ingredient to a good survival radio after price.
    Medical equipment ohio When you go through every one of the contents of such websites then you will come to find out about the important points about the
    products and their uses.

    You ought to be able to create it back out to the lobby in a lot of time.
    medical equipment kent wa equipment anchorage While both satellite and internet require
    purchase more equipment to setup in vehicles, traditional radio is a standard part of vehicle production. These are developed especially for fuel delivery truck applications requiring intrinsically safe, explosion proof handhelds.

  6. Ytb Travel

    )Do you seriously want to take your Visalus home business to a new level.
    Food being part of the physiologic needs of people should be
    taken with some sort of discipline. Well, mainly because it is tricky to differentiate your products and solutions from other providers this
    sort of as Herbalife, Pharmanex, Usana, Noni, or any of
    the other hundreds of herbal supplement Multi level marketing companies about the
    planet.

  7. genesis pure

    )Do you seriously want to take your Visalus home business
    to a new level. If you want to build a considerable business, you’ll have to be able to come up with
    constant leads. 7 million which was up $ 110 million compared to the year
    previous.

  8. jeunesse global

    Most protein shakes are loaded with sugar, fat, and other ingredients that aren’t even necessary for the body.
    Most of them are full of sugar and processed flour. 7 million which was up $
    110 million compared to the year previous.

  9. sisel

    ‘This week, I will only drink one beer on Friday night,
    saving myself thousands of calories’. This isn’t the only reason that we know
    Vi – Salus isn’t a scam; the product is real, and it’s backed by
    real research in nutrition too. Media Highlights: Blair on “The Big Idea – The American Dream” with Ivanka Trump:.

  10. legal shield

    )Do you seriously want to take your Visalus home business to a new level.

    This isn’t the only reason that we know Vi – Salus isn’t a
    scam; the product is real, and it’s backed by
    real research in nutrition too. The program is based on nutrition that helps you burn fat and
    keep lean muscle, boosts your metabolism and helps
    control hunger.

  11. Aileen

    This attack known as “Backlash Wave” in the English anime.
    Manga comic’s characters are also featured in wallpapers that you can place on your desktop.
    Only then, your friends would get impressed by you.

    Visit my web site; create your own anime character (Aileen)

  12. nz loans

    To be able to avoid excessive fees, look around around before taking a payday advance out.
    There might be a few businesses locally that provide nz loans loan, and others might not provide rates that are better than some of these firms.

    By checking around, you may be in a position if it is time
    to settle the mortgage to conserve money.

  13. advocare

    The Vi – Salus is not in the run ofpublicity like the other health products that excites the people and ready togo, but that die away in few weeks because they are physically very difficult tokeep up.
    As way as their items go, they marketplace numerous
    science based mostly nutraceuticals that are created to
    assist in your total wellness and properly becoming. The program
    is based on nutrition that helps you burn fat and keep lean muscle, boosts
    your metabolism and helps control hunger.

  14. information management

    Options are being sought by firms in a time when the traditional borders of
    the companies have become increasingly porous to incorporate partners, providers, and customers as integrated
    parts of these functions. In the same time, web-based software h
    as continued to evolve in its capabilities and reach, and firms have increasingly embraced cloud-based
    providers located outside the corporate firewall.

    Here is my web site … information management

  15. 1033

    School can be overwhelming to a student that is new, when you
    think of it. Such enormous changes, in other areas of your life–at college these adjustments occur all at
    once. It is very important to have advice and assist.

    That is why the reason why this post features some Dubai schools suggestions to remember
    to are a success.

    my web blog 1033

  16. blood brothers 2 cheat

    Undeniably believe that which you said. Your favorite reason appeared
    to be on the web the simplest thing to be aware of.
    I say to you, I definitely get annoyed while
    people consider worries that they just do not know about.

    You managed to hit the nail upon the top as well as defined out the whole thing without having side effect , people can take a signal.

    Will probably be back to get more. Thanks

  17. Pirate Bay CN

    Government uses, hence providing adequate protection for important and confidential digital information. Anyone
    who may have a computer with the internet connection could
    find and download the sunday paper, document, tv show, film,
    song, image or photo. Just because school rates aren’t advertised, for many people that they aren’t available.

  18. dxn

    ‘This week, I will only drink one beer on Friday
    night, saving myself thousands of calories’. As mentioned earlier, Visalus seriously
    isn’t a gimmick. 7 million which was up $ 110
    million compared to the year previous.

  19. Porno

    I’ve been exploring for a little bit for any high quality articles or
    blog posts in this kind of space . Exploring in Yahoo I ultimately stumbled upon this web site.
    Studying this information So i’m happy to express that I’ve a very
    just right uncanny feeling I found out exactly what I needed.
    I so much surely will make certain to do not omit this
    website and provides it a glance on a constant basis.

    my web blog – Porno

  20. roofing

    Bսt theгe are certain terms and conditions that you neeԀ to satisfy to become eligible fօr tɦeѕe insurances.
    Bеsides choosing աҺаt material tߋ be installed ɑs roofs,
    tɦe roofing contractor ѡill play a bigger role іn the whole
    procedure. You shoսld seek estimates from seveгal contractors ƅefore mаking up yߋur mind about wҺom to
    hire.

  21. roofing

    And after theіr useful life is oveг, metal roofing materials ϲɑn bе recycled.

    Consideг testimonials fгom your friends ɑnd colleagues to
    engage а nicely experienced contractor locally. Ƭhеre аre basically fіve types of roofing insurance policies:
    ÔŒeneral Liability, Workers Compensation, Commercial Auto
    É‘nd Tools & Equipment, аnd Roofer’Ñ• Bonds.

Leave a Reply