Difference between revisions of "TvNow"

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[[Image:tvnow-external.jpg]]
 
[[Image:tvnow-external.jpg]]
  
U1 Sharp LH79524-NOE A0.
+
U1 Sharp [[LH79524]]
     208 BGA Package
+
     ARM720T Processor
    Datasheet. Userguide. Sharp's site.
 
    A0. Rev. Non ROHS 76.2MHz
 
    VDDC = 1.8V
 
    VDD = 3.3V
 
    USB 1.1 High speed device support with OHCI/UHCI interface
 
    Glueless NAND interface
 
    Alternative booting on POR
 
    16K SRAM
 
    JTAG pins:
 
        * TDO - 4mA drive
 
        * TDI - internal pull up with 50K, schmitt trigger
 
        * TMS - internal pull up with 50K, schmitt trigger
 
        * TCLK - internal pull up with 50K, schmitt tigger
 
  
 
U2 Conexant CX25836-3A
 
U2 Conexant CX25836-3A

Revision as of 10:52, 31 May 2007

Tvnow-external.jpg

U1 Sharp LH79524

   ARM720T Processor

U2 Conexant CX25836-3A

   Located below a shield. TQFP-64
   Single chip video decoder. Datasheet and product brief.
   IO are LVTTL. IOL=4mA drive.

U4 Unknown COB package U5 Green unmarked 0805 package

   Located on USB board 

U6 Green unmarked 0805 package

   Located on USB board 

U7 Unknown 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 2004SFC-DRAM.pdf. 6ns (166MHz), 2Mx32 

U11 Hynix HY27UA081G1M

   Wide, leaded package
   NAND flash, 1Gb 

U12 U14 Unknown 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

Tvnow-internal.jpg