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yakumo_hypersound_car [2005/11/03 23:13]
manuel created
yakumo_hypersound_car [2014/01/16 20:08] (current)
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 I bought this car mp3 (MP3-CD/MMC/SD/USB/radio) player during summer of 2005. I bought this car mp3 (MP3-CD/MMC/SD/USB/radio) player during summer of 2005.
 It was relatively cheap, and most importantly, it had a SD/MMC card slot. It was relatively cheap, and most importantly, it had a SD/MMC card slot.
 +
 +Yakumo has a German-speaking support forum here:\\
 + http://forum.yakumo.de/german/index.php?t=thread&frm_id=123&
  
 This car radio was also sold in a near-identical version by Aldi-Sued in Germany under the name "Tevion ...???" but without a remote control. This car radio was also sold in a near-identical version by Aldi-Sued in Germany under the name "Tevion ...???" but without a remote control.
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 When this happens, pressing the reset button brings it back to life, but of course the radio station memory keys loose their information... When this happens, pressing the reset button brings it back to life, but of course the radio station memory keys loose their information...
  
 +===== Whats Inside? =====
  
 Here are some misc stuff I found out about the unit: Here are some misc stuff I found out about the unit:
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   * The USB/MMC/SD seems to be controlled by a board with   * The USB/MMC/SD seems to be controlled by a board with
      * SST 39VF800A      * SST 39VF800A
 +       * "Multi Purpose Flash" memory
 +       * http://www.sst.com/products.xhtml/parallel_flash/39/x16/SST39VF800A
 +       * http://www.sst.com/downloads/datasheet/S71117.pdf
 +       * 512K x 16 (8MBit)
      * Samsung K4S161622H      * Samsung K4S161622H
 +       * http://www.samsung.com/Products/Semiconductor/DRAM/SDRAM/SDRAMcomponent/16Mbit/K4S161622H/K4S161622H.htm
 +       * Datasheet: http://www.samsung.com/Products/Semiconductor/DRAM/SDRAM/SDRAMcomponent/16Mbit/K4S161622H/ds_k4s161622h_rev15.pdf
 +       * 512K x 16Bit x 2 Banks SDRAM ==> 1Mx16
      * Telechips TCC720A      * Telechips TCC720A
        * Appears to be a MP3 decoder chip, based on a ARM940T        * Appears to be a MP3 decoder chip, based on a ARM940T
        * http://www.telechips.com/product/product_mp3_tcc72x.htm        * http://www.telechips.com/product/product_mp3_tcc72x.htm
 +       * apparently, the datasheet is not publicly available
        * has an on-chip stereo DAC        * has an on-chip stereo DAC
        * can interface: IDE, USB, IrDA, SRAM, DRAM, Flash, ...        * can interface: IDE, USB, IrDA, SRAM, DRAM, Flash, ...
        * has a JTAG interface.        * has a JTAG interface.
 +  * The interface board thats piggy-backed onto the board with the Flash/DRAM/TC720 has
 +       * a SD/MMC card slot
 +       * the USB connector
 +       * two voltage regulators:
 +         * a 7805 LDO voltage regulator
 +         * a SAC15x0  (x is not readable, but probably a 0)
 +           * Up&Down Multi Voltage Regulator
 +           * can deliver up to 1000mA
 +           * more info here: http://www.cosmodesign.com/english/analog/udmvreg.htm
 +       * and a WM8725 (WM8725GED) stereo audio DAC
 +         * http://www.wolfsonmicro.com/products/digital_audio/dacs/WM8725/
 +         * Datasheet: http://www.wolfsonmicro.com/uploads/documents/WM8725.pdf
 +
 +  * The CD Drive takes up the most space, but can be removed quite easily with just four screws and one flat cable (24pin). It was made by Komec
 +      * http://www.komec.com.cn/eabout.htm
 +      * Seems to be a CDX-100 Series. (Although I can't exactly identify which one). http://www.komec.com.cn/eproduct.asp?classid=&Page=1
 +      * It uses a Toshiba TC94A14 chipset
 +        * http://www.semicon.toshiba.co.jp/openb2b/websearch/productDetails.jsp?partKey=TC94A14FA
 +        * Datasheet: http://www.alldatasheet.com/datasheet-pdf/pdf/TOSHIBA/TC94A14FA.html
 +
 +===== Pictures =====
 +
 +While taking it apart, I took lots of pictures: http://projects.varxec.net/images/yakumo/gal/yakumo_car_mp3_galleryidx.html \\
 +(I also put it back together, and it still works 8-) )
 +
 +===== Where to Buy =====
 +
 +Where to buy:
 +
 +  * http://www.amazon.de/exec/obidos/ASIN/B0009MZ7P2/302-7243173-7480049
 +  * http://www.reichelt.de  OrderNo: YAK HYPERSOUND C
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