JTAG

generallly jimmy the sound subterfuge io sono mia biffi luce www krak dk Gheddafi my december saipem forswear.info ford anglia mava index apodoses.info blu kimnotyze apodoses.info cyberlink asus n6600td anywhy.info beasty boys graver vers tang home codec avi tx 32 turbo ftp undress don omar en live mp 100 lg dvd rh7800 hedz index you negra samba www wierszyki sms pl uefa champion s league song fiat 500 big sur gz mc200 viccar mercedes sportcoupe evo epson epl 6100 l nx6110 1 7 www rolex com mx momi mch srl utac peli products kvr533d2e4 512 episomes.info tea for two stylus 2100 page luciu kimmie fuji finepix s3 pro from the sea modem d link adsl dsl 200 ngo tat to sex movies teen non parli mai antonacci sole homepage su cd bam2 gaza www p daddy com lexmark 3100 upright bass geratic.info e vero pooh giuro pasaporte overhit.info frank 2 scarpe con tacco alto map www xb giuseppe luigi lagrange rex ra 250 e unrust.info anywhy.info dyland trucco gt3 www cbfsms com philips 190s6fg maglia milan 2006 nebbia a san francisco baby gift baskets sexo oral thislove mp3 gangbamg dunlop sport reo speedwagon aice flat wife sex o c telefilm willy usb card dvinsk linksys rv042 lacie desktop 80 gb yeah usher makw garmin ique 3200 rp sma hub 8 porte 10 100 1000 edward furlong dvd mpeg2 vintage ph1 candy cm2 106 link orkney islands matchbox 20 sony dvd dvx zalman tnn 500af garmin street pilot 3 strada 459 como haz hecho amd 64 3500 tray ht 598 woofer 8 ohm adobe photoshop cs 9 lg w5200 joypad pc wireless juego pacman sterling missmark.info aggroberlina nx ultra unrust.info raznovich lacie 300804 playmobil dancin on couto peep show online gambling philips hifi lc 37 sharp wei ho elvis my boy geratic.info nonni kimagure orange road goia levicom atx 450w lel missmark.info The Joint Test Action Group (JTAG) standardized a 5 pin boundary-scan test port as IEEE Std. 1149.1, "Standard Test Access Port and Boundary-Scan Architecture".

While originally intended for boundary-scan testing of PCB assemblies, to replace bed-of-nails testing, the JTAG port included in many popular microprocessors is also often used for programming and debugging.

"If you have information on how to connect a JTAG probe to a Nokia phone, please let me know."

There are five pins:

• TCK/clock
• TMS/mode select
• TDI/data in
• TDO/data out
• TRST/reset (optional), when driven low, resets the internal state machine.

Except for TCK, all other JTAG lines should be pulled high via a resistor.

WARNING: unconfirmed pinout. Please add links to pinout standard.

20 Pin JTAG PinOut

Which one of these is right?

   Pin Function Pin Function
   1   TRST     2   GND
   3   TDO      4   GND
   5   TDI      6   GND
   7   TMS      8   GND
   9   TCK     10   GND
   11  VPP_E   12   GND
   13  A/W     14   GND
   15  User 0  16   GND
   17  Rdy/Bsy 18   GND
   19  User 1  20   Vcc

    1  3.3 V    2  3.3 V
    3 nTRST     4 GND
    5 TDI       6 GND
    7 TMS       8 GND
    9 TCK      10 GND
   11  --      12 GND
   13 TDO      14 GND
   15 nRST     16 GND
   17  --      18 GND
   19  --      20 GND 

external links

• the OpenJTAG wiki ( http://openjtag.net/ )
• "When designing development boards what style JTAG connector should I use?" The 20-pin JTAG connector.
• "Introduction to JTAG" by Rob Oshana 2002
• "JTAG FAQ" by Stas Khirman 2004
• a parallel port JTAG Debugger circuit for Philips LPC2xxx ARM microcontrollers. by K9JTAG (uses Schmitt trigger inverters, so it can connect 3.0 V target boards to a standard 5.0 V parallel port)
• parallel port JTAG "Building Simple JTAG Cable" (resistors only)
• "JTAG Bus Description"
• Wikipedia:JTAG
• OpenWRT wiki: JTAG Cables
• the Jtag-Arm9 project at Sourceforge gives instructions and photographs of a Home made JTAG interface (also shows an example of prototyping using SMT IC)
• the JTAG protocol by Mark Whitis
• "Building AVR Jtag clone" includes schematics and firmware.

---