Difference between revisions of "TvNow"
Line 11: | Line 11: | ||
Alternative booting on POR | Alternative booting on POR | ||
16K SRAM | 16K SRAM | ||
− | |||
JTAG pins: | JTAG pins: | ||
− | |||
* TDO - 4mA drive | * TDO - 4mA drive | ||
* TDI - internal pull up with 50K, schmitt trigger | * TDI - internal pull up with 50K, schmitt trigger | ||
Line 51: | Line 49: | ||
discusion: http://forums.parallax.com/forums/default.aspx?f=15&m=158549 | 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 | vendor: http://www.hasbro.com/tiger/default.cfm?page=browse&product_id=18617 | ||
[[Image:tvnow-internal.jpg]] | [[Image:tvnow-internal.jpg]] |
Revision as of 10:49, 31 May 2007
U1 Sharp LH79524-NOE A0.
208 BGA Package 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
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