SemiconductorTeardown Report - Jingwah Digital - JWM62 MP3 PortalPlayer(1024Mb)
 Jingwah Digital. http://www.jwdigital.com JWM62 Product Specification:MP3/WMA, USB2.0, 7 color OLED display Price: 1024Mb, 288RMB |
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Again, the player looks pretty good, but when you go inside it, you will find the manufacturing quality is not really good. The "magic" tape put all the components together, I means they loosely stick together.
The chipset used is Sigmaltel STMP3505
There are 2 main category in Sigmatel 's portable media audio product line, STMP3500 and STMP3600. STMP3600 is the 4th generation audio SoC equipped with MPEG4 codec and extra long battery life(60hours for 1 AACell) while STMP3500 is the low cost soluation with MP3 codec and competitive battery life(20~25hrs for 1 AACell). STMP3505 is belong to STMP3500 family with Flahs drive interface.
Starting from 2005, the datasheet are no longer avaiable in Sigmatel's web, in which I think they are intended to hide all product information form their competitor such as Action/Chian and Telechip/Korea. Therefore I can only find the system block diagram and the product selection guideline for the chips.
Product selection guideline for portable media chipset
Jingwah Digital
Established in Feb.2000, a subsidiary of Jingwah Electronics, Jingwah Digital focus on the design and manufacure of MP3 player, PMP and USB drive. They also provide OEM services and the major customer are Sanyo, Radio Shack, Scott and Teknos. They have 3000 employee located in Pinghu of Shenzhen () with 20meter2 factory.2006
Shenzhen Jingwah Electronics Co. Ltd
http://www.jingwah.com
Established in 1981, with the joint-venture by Najing Panda Electronics Co., Ltd and Shenzhen Zhongdian Investment Co., Ltd, Jianwah Electoronics is now "China Top 100 Electronic Enterprises" and their manin business is multimedia consumer product such as CD, VCD and DVD player. 2006
Aug 2006
