Difference between revisions of "TvNow"

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Revision as of 18:21, 10 February 2008


U1 Sharp LH79524

   ARM720T Processor

U2 Conexant CX25836-3A

   Located below a shield. TQFP-64
   Single chip video decoder. http://elinux.org/images//8/83/Pdf.gif Datasheet http://elinux.org/images/d/da/Info_circle.png and http://elinux.org/images//8/83/Pdf.gif Product Brief http://elinux.org/images/d/da/Info_circle.png.
   IO are LVTTL. IOL=4mA drive.

U4 Unknown Chip On Board(CoB) package U5 Green unmarked 0805 package

   Located on USB board 

U6 Green unmarked 0805 package

   Located on USB board 

U7 Unknown Chip On Board(CoB) package U8 TI LM324 U9 Hynix HY57V643220DT-6

   Long, leaded TSOP II 86 pin package
   SDRAM, VDD=3.3 & VDDQ=3.3V, 64Mbit, x32, 4banks, LVTTL
   Decoded per the http://elinux.org/images//8/83/Pdf.gif datasheet http://elinux.org/images/d/da/Info_circle.png. 6ns (166MHz), 2Mx32 

U11 Hynix HY27UA081G1M

   Wide, leaded package
   NAND flash, 1Gb 

U12 U14 Unknown Chip On Board(CoB) package

Boards The entire system is composed of 4 boards. Most electrolytics are through hole. However, there are a few scattered tantalums.

   * There is a main board with the CPU, memory, and flash, and a SD socket. There is a cylinder shaped crystal (probally 32KHz, watch xtal) and a 28.6363Mhz xtal.
   * There is a board that has the AV inputs on one side.
   * On the otherside, there is a board with a mini USB connector.
   * A 4th board sits on top of 2 sets of fine (0.05 or finer) headers. 

discusion: http://forums.parallax.com/forums/default.aspx?f=15&m=158549

vendor: http://www.hasbro.com/tiger/default.cfm?page=browse&product_id=18617