The TrekStor eBook Reader 3.0 (EBR30-a), review and dissection

The TrekStor eBook Reader 3.0, front
The TrekStor eBook Reader 3.0, front on

There a many, many, e-book reader devices available these days, and they're quickly becoming pretty affordable. The currently cheapest device in Germany (that I know of) is the TrekStor eBook Reader 3.0, model number EBR30-a, at 59.- Euros via Weltbild or Hugendubel.

The device has an 800x480 7" TFT (yep, no e-ink), 2100mAh battery, it can display PDFs, EPUB, and TXT files (and Adobe DRM crap, which I don't really care about), it has an accelerometer which allows for landscape/portrait switching, it can play MP3, OGG, WAV, and WMA audio files (headphone jack), it can display pictures (BMP, GIF, JPG, even PNG, though that's not mentioned in the vendor's specs), and it has 2GB internal storage for books/music/pictures. Uploading of (non-DRM) content is done by a simple file copy, it enumerates as a standard USB mass storage device with FAT filesystem. It's a relatively nice reader for the price, I've read a few PDFs (datasheets, presentations) on it in the subway/train while listening to music from the device and it's quite OK for my purposes. So much for the review part.

However, I didn't really buy it for reading books on it, I was more interested in taking it apart, of course ;-) My hope was that it would turn out to be a really cheap device running Linux/U-Boot which would be perfect for playing around with embedded Linux stuff. Unfortunately, I wasn't so lucky (it seems).

The TrekStor eBook Reader 3.0, opened

I've posted a few photos of the device and its hardware components on my flickr account and over at, together with all the information I was able to find out so far. Here's a quick summary:

  • Main CPU/SoC: FI E200 B6077BA 26P1
  • RAM: MIRA P3S12D40ETP (512MBit / 64MByte DDR SDRAM, max. 200MHz)
  • NAND flash: Samsung K9GAG08U0E (16GBit / 2GByte, x8, 3.3V)
  • Battery management: KrossPower AXP199 A5004AB 36G
  • RTC/clock/calender chip (I2C): H8563S
  • Some accelerometer (to switch between landscape/portait mode), model unclear so far, maybe the chip labeled 605 132?

The TrekStor eBook Reader 3.0, CPU

There are public datasheets for most of the hardware components (see for links), but unfortunately the most important one (for the CPU) is not yet found/identified. I was told that the CPU/SoC is probably based on an ARM9 (ARM926EJ-S) core and the firmware running on it seems to be some uCos-based RTOS (not Linux, unfortunately).

So far I was not able to find out the vendor name or website of the "FI E200" CPU/SoC (let alone any datasheets), any hints would be highly appreciated. I checked Processor Licensees, but the only two companies whose name starts with "F" having licensed an ARM9 core are Fujitsu and Freescale, which doesn't fit, I think?

I could (and probably will) check the PCB for RX/TX lines on an UART and/or JTAG pads (none are obviously labelled), and given that it's and ARM9 core there is a good chance that OpenOCD can be used and that a standard cross-gcc toolchain for ARM will work. However, that is all pretty pointless until it's clear which SoC exactly is used, and thus whether there is already Linux and/or U-Boot support for it and/or whether datasheets are available so that the respective code could be written. Without datasheets, this is going to be a pretty painful experience, not really worth investing much time, IMHO.

If anyone knows more about the vendor/device and respective datasheets, please let me know. Thanks!

Update 2012-04-19: I found the UART TX pin a while ago, a bootlog is available. The CPU and all other chips are also known now: The SoC is an Allwinner Technology F1 E200, the orientation sensor is a MEMSIC MXC6225XU.

Technical Editor of a German Drupal book

Recently, I've had the pleasure to try out something new - reviewing a book before it is published.

I have been acting as technical editor/reviewer (or whatever that's called in English) for the first German book about Drupal, written by Hagen Graf: "Drupal: Community-Websites entwickeln und verwalten mit dem Open Source-CMS". The book covers the Drupal 4.7-beta series and is a good introduction to Drupal and it's concepts. It's a nice book for people who want to learn more about creating websites with Drupal. More details in this post over at

Reviewing books is a lot of fun - I might do that more often in future ;)

My (second) Drupal article has been published

After my last Drupal article in the German + international Linux Magazin(e) from early 2005, my new Drupal-related article has been published in PHP Solutions's issue 1/2006 (13).

After I was back from a short vacation without Internet access, I was surprised to see a post by Robert Douglass titled "Uwe Hermann's Drupal article in PHP Solutions is out" on the main page. At that point I didn't even know that the article had been published ;-)

Robert wrote a short review of the article which outlines the main content. In contrast to my last article which was a general introduction to Drupal, this one concentrated on some specific (probably more advanced) topics instead: multi-site install, l10n+i18n, search engine optimization, and AJAX(-like) user interfaces of the upcoming Drupal 4.7 release.

The printed article should be available in multiple languages (German, French, Polish and Italian, at least). There might be a free online version as soon as the next issue of PHP Solutions is published, but I'm not entirely sure.

Thanks a lot to Robert Douglass for the review and to Drupal's Benevolent Dictator for Life Dries Buytaert who reviewed an early draft of my article and provided helpful suggestions!

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